Glass with low additional modifier content

Abstract

A glass composition comprising: from 55.0 mol% to 70.0 mol% of SiO2; al2O3 in an amount of from 12.0 mol% to 20.0 mol%; from 5.0 mol% to 15.0 mol% of Li2O; and Na2O in an amount of from 4.0 mol% to 15.0 mol%. The glass composition has the following relationship:-8.00 mol% < = R2O + RO-Al2O3-B2O3-P2O5 < =-1.75 mol%, 9.00 < = (SiO2 + Al2O3 + Li2O) / Na2O, and (Li2O + Al2O3 + P2O5) / (Na2O + B2O3) < = 3.50. The glass composition may be used in glass articles or consumer electronics.

Description

[0001] This application is a divisional application of the invention patent application filed on November 29, 2018, with application number 201811445343.3 and invention title "Glass with Low Additional Modifier Content".

[0002] Related applications

[0003] This application claims priority to U.S. Provisional Application No. 62 / 591,953, filed November 29, 2017, the contents of which are incorporated herein by reference in their entirety. Technical Field

[0004] This specification generally relates to glass compositions suitable for use as cover glass in electronic devices. More specifically, this specification relates to lithium-containing aluminosilicate glasses, which can be formed into cover glass for electronic devices by fusion drawing. Background Technology

[0005] The mobile nature of portable devices such as smartphones, tablets, portable media players, personal computers, and cameras makes them particularly vulnerable to accidental drops onto hard surfaces like the ground. These devices often include a cover glass, which can be damaged upon impact with a hard surface. In many of these devices, the cover glass functions as a display screen cover and may also incorporate touch functionality, thus negatively impacting the device's usability when the cover glass is damaged.

[0006] When a portable device is dropped onto a hard surface, there are two main failure modes for the glass cover. One mode is flexure failure, which is caused by the bending of the glass when the device is subjected to dynamic loads from impact with a hard surface. The other mode is sharp contact failure, which is caused by damage introduced into the glass surface. Impact of glass with a rough, hard surface (such as asphalt, granite, etc.) results in sharp indentations in the glass surface. These indentations become failure sites in the glass surface, from which cracks can develop and propagate.

[0007] Ion exchange technology can make glass more resistant to bending failures, including by inducing compressive stress on the glass surface. However, ion-exchanged glass remains susceptible to dynamic sharp contacts due to the high stress concentration caused by localized indentations in the glass resulting from sharp contacts.

[0008] Glass manufacturers and handheld device manufacturers have been working to improve the resilience of handheld devices to sharp-contact failures. Solutions range from coatings on the cover glass to the panel itself: these solutions prevent the cover glass from directly impacting a hard surface when the device is dropped. However, due to aesthetic and functional limitations, it is difficult to completely prevent the cover glass from impacting hard surfaces.

[0009] It is also desirable for portable devices to be as thin as possible. Therefore, in addition to strength, it is desirable to manufacture the glass used as the cover glass in portable devices to be as thin as possible. Therefore, in addition to increasing the strength of the cover glass, it is desirable for the glass to have the mechanical properties required to be shaped by processes that enable the manufacture of thin glass articles (e.g., thin glass sheets).

[0010] Therefore, there is a demand for glass that can be strengthened, for example, by ion exchange, and that has the mechanical properties required to shape them into thin glass articles. Summary of the Invention

[0011] According to a first embodiment, a glass composition comprises: 55.0 mol% to 70.0 mol% of SiO2; 12.0 mol% to 20.0 mol% of Al2O3; 5.0 mol% to 15.0 mol% of Li2O; and 4.0 mol% to 15.0 mol% of Na2O, wherein: -8.00 mol% ≤ R2O+RO–Al2O3–B2O3–P2O5 ≤ -1.75 mol%, 9.00 ≤ (SiO2+Al2O3+Li2O) / Na2O, and (Li2O+Al2O3+P2O5) / (Na2O+B2O3) ≤ 3.50.

[0012] According to a second embodiment, a glass article includes: a first surface; a second surface opposite to the first surface, wherein the thickness (t) of the glass article is expressed as the distance between the first surface and the second surface; and a compressive stress layer extending from at least one of the first surface and the second surface to the thickness (t) of the glass article, wherein the central tension of the glass article is greater than or equal to 60 MPa, the compression depth of the compressive stress layer is greater than or equal to 0.15 t and less than or equal to 0.25 t, and the glass article is formed of glass comprising: greater than or equal to 55.0 mol% and less than or equal to... 70.0 mol% SiO2; greater than or equal to 12.0 mol% to less than or equal to 20.0 mol% Al2O3; greater than or equal to 5.0 mol% to less than or equal to 15.0 mol% Li2O; and greater than or equal to 4.0 mol% to less than or equal to 15.0 mol% Na2O, wherein: -8.00 mol% ≤ R2O+RO–Al2O3–B2O3–P2O5 ≤ -1.75 mol%, 9.00 ≤ (SiO2+Al2O3+Li2O) / Na2O, and (Li2O+Al2O3+P2O5) / (Na2O+B2O3) ≤ 3.50.

[0013] According to a third embodiment, a glass article includes: a first surface; a second surface opposite to the first surface, wherein the thickness (t) of the glass article is expressed as the distance between the first surface and the second surface; and a compressive stress layer extending from at least one of the first surface and the second surface to the thickness (t) of the glass article, wherein the central tension of the glass article is greater than or equal to 60 MPa, the compression depth of the compressive stress layer is greater than or equal to 0.15 t and less than or equal to 0.25 t, and the glass article has a composition at the central depth of the glass article comprising: greater than or equal to 55.0 mol%. The content of SiO2 is less than or equal to 70.0 mol%; Al2O3 is greater than or equal to 12.0 mol% to less than or equal to 20.0 mol%; Li2O is greater than or equal to 5.0 mol% to less than or equal to 15.0 mol%; and Na2O is greater than or equal to 4.0 mol% to less than or equal to 15.0 mol%, wherein: -8.00 mol% ≤ R2O+RO–Al2O3–B2O3–P2O5 ≤ -1.75 mol%, 9.00 ≤ (SiO2+Al2O3+Li2O) / Na2O, and (Li2O+Al2O3+P2O5) / (Na2O+B2O3) ≤ 3.50.

[0014] According to a fourth embodiment, a glass composition comprises: 60.0 mol% to 70.0 mol% of SiO2; 12.0 mol% to 18.0 mol% of Al2O3; 5.0 mol% to 10.0 mol% of Li2O; 4.0 mol% to 10.0 mol% of Na2O; and 0.75 mol% of P2O5, wherein: Li2O / Na2O is greater than or equal to 1.00, and Al2O3 + Li2O is less than or equal to 25.25 mol%.

[0015] Further features and advantages will be set forth in the detailed description below and will be apparent to those skilled in the art to some extent, or will be appreciated by practice of the embodiments described herein (including the detailed description below, the claims and the drawings).

[0016] It should be understood that the foregoing general description and the following detailed description describe various embodiments and are intended to provide an overview or framework for understanding the properties and characteristics of the claimed subject matter. Drawings are included to provide a further understanding of the various embodiments and are incorporated in and form a part of this specification. The drawings illustrate the various embodiments described herein and, together with the description, serve to explain the principles and operation of the claimed subject matter. Attached Figure Description

[0017] Figure 1 A cross-section of a glass having a compressive stress layer on its surface, according to an embodiment disclosed and described herein, is shown schematically.

[0018] Figure 2A It is a plan view of an exemplary electronic device containing any glass article disclosed herein; and

[0019] Figure 2B yes Figure 2A A perspective view of an exemplary electronic device. Detailed Implementation

[0020] Reference will now be made in detail to alkali metal aluminosilicate glasses according to various embodiments. Alkali metal aluminosilicate glasses have good ion exchangeability, and chemical strengthening processes have been used to achieve high strength and high toughness properties in alkali metal aluminosilicate glasses. Sodium aluminosilicate glass is a highly ion-exchangeable glass with high glass formability and quality. Al2O3 substitution into the silicate glass network increases the interdiffusion rate of monovalent cations during ion exchange. By chemical strengthening in a molten salt bath (e.g., KNO3 and / or NaNO3), glasses with high strength, high toughness, and high resistance to indentation cracks can be achieved.

[0021] Therefore, the use of alkali metal aluminosilicate glasses, which possess excellent physical properties, chemical durability, and ion exchangeability, as covering glasses has attracted considerable attention. In particular, this paper presents lithium-containing aluminosilicate glasses with lower annealing and softening temperatures, lower coefficients of thermal expansion (CTE) values, and rapid ion exchangeability. Greater center tension (CT), depth of compression (DOC), and compressive stress (CS) can be achieved through different ion exchange processes. However, the addition of lithium to alkali metal aluminosilicate glasses can lower the glass's melting point, softening point, or liquidus viscosity.

[0022] Drawing processes are desirable for forming glass articles (such as glass sheets) because they allow for the formation of thin glass articles with few defects. It was previously thought that glass compositions required relatively high liquidus viscosities—e.g., greater than 1000 kP, 1100 kP, or 1200 kP—to be shaped by drawing processes (such as melt drawing or slot drawing). However, advancements in drawing processes have made it possible to use glass with lower liquidus viscosities. Therefore, the glass used in drawing processes can include more lithium oxide than previously thought, and can include more glass network-forming components, such as, for example, SiO2, Al2O3, and B2O3. Consequently, this paper provides a balance of various glass components that allows the glass to achieve the benefits of adding lithium and glass network-forming agents to the glass composition without negatively impacting the composition.

[0023] In the embodiments of the glass compositions described herein, unless otherwise stated, the concentrations of the constituent components (e.g., SiO2, Al2O3, Li2O, etc.) are given as mole percentages (mol%) based on oxides. The components of the alkali metal aluminosilicate glass compositions according to each embodiment are discussed below. It should be understood that any of the various ranges of a component can be combined individually with any of the various ranges of any other component.

[0024] In the embodiments of the alkali metal aluminosilicate glass compositions disclosed herein, SiO2 is the most abundant component; for example, SiO2 is the main component of the glass network formed by the glass composition. Pure SiO2 has a relatively low CTE and does not contain alkali metals. However, pure SiO2 has a high melting point. Therefore, if the concentration of SiO2 in the glass composition is too high, the formability of the glass composition may be reduced because a higher concentration of SiO2 increases the difficulty of melting the glass, which in turn adversely affects the formability of the glass. In embodiments, the glass composition typically comprises an amount of SiO2 greater than or equal to 55.0 mol% to less than or equal to 70.0 mol%, and amounts of SiO2 in all ranges and subranges between the aforementioned values. In some embodiments, the glass composition comprises an amount of SiO2 greater than or equal to 58.0 mol%, for example, greater than or equal to 60.0 mol%, greater than or equal to 62.0 mol%, greater than or equal to 64.0 mol%, greater than or equal to 66.0 mol%, or greater than or equal to 68.0 mol%. In embodiments, the glass composition comprises less than or equal to 68.0 mol% of SiO2, for example, less than or equal to 66.0 mol%, less than or equal to 64.0 mol%, less than or equal to 62.0 mol%, less than or equal to 60.0 mol%, or less than or equal to 58.0 mol%. It should be understood that in various embodiments, any of the above ranges can be combined with any other range. In embodiments, the glass composition comprises more than or equal to 58.0 mol% to less than or equal to 68.0 mol% of SiO2, for example, more than or equal to 60.0 mol% to less than or equal to 66.0 mol%, or more than or equal to 62.0 mol% to less than or equal to 64.0 mol%, and all ranges and sub-ranges between the foregoing values.

[0025] The glass compositions of various embodiments may further include Al2O3. Al2O3 can be used as a glass network forming agent, similar to SiO2. Al2O3 can increase the viscosity of the glass composition due to its tetrahedral coordination in the glass melt formed from the glass composition, and reduces the formability of the glass composition when the amount of Al2O3 is too large. However, when the concentration of Al2O3 is balanced with the concentration of SiO2 and alkali metal oxides in the glass composition, Al2O3 can lower the liquidus temperature of the glass melt, thereby increasing the liquidus viscosity and improving the compatibility of the glass composition with certain forming processes such as melt molding. In embodiments, the glass composition typically includes Al2O3 at a concentration greater than or equal to 12.0 mol% to less than or equal to 20.0 mol%, and at concentrations in all ranges and subranges between the aforementioned values. In some embodiments, the glass composition comprises 13.0 mol% or more of Al2O3, for example, 14.0 mol% or more, 15.0 mol% or more, 16.0 mol% or more, 17.0 mol% or more, or 18.0 mol% or more. In other embodiments, the glass composition comprises less than or equal to 19.0 mol% of Al2O3, for example, 18.0 mol% or more, 17.0 mol% or more, 16.0 mol% or more, 15.0 mol% or more, 14.0 mol% or more, or 13.0 mol% or more. It should be understood that in each embodiment, any of the above ranges may be combined with any other range. In an embodiment, the glass composition comprises an amount of Al2O3 greater than or equal to 13.0 mol% to less than or equal to 19.0 mol%, for example greater than or equal to 14.0 mol% to less than or equal to 18.0 mol%, or greater than or equal to 15.0 mol% to less than or equal to 17.0 mol%, and all ranges and subranges between the foregoing values.

[0026] Similar to SiO2 and Al2O3, P2O5 can be added to glass compositions as a network forming agent, thereby reducing the meltability and formability of the glass composition. Therefore, P2O5 can be added in amounts that do not excessively degrade these properties. The addition of P2O5 can also increase the diffusivity of ions in the glass composition during ion exchange treatment, thereby improving the efficiency of these treatments. In embodiments, the glass composition may include amounts of P2O5 greater than or equal to 0.0 mol% to less than or equal to 5.0 mol%, and amounts in all ranges and subranges between the aforementioned values. In some embodiments, the glass composition may include amounts of P2O5 greater than or equal to 0.5 mol%, such as greater than or equal to 1.0 mol%, greater than or equal to 1.5 mol%, greater than or equal to 2.0 mol%, greater than or equal to 2.5 mol%, greater than or equal to 3.0 mol%, greater than or equal to 3.5 mol%, greater than or equal to 4.0 mol%, or greater than or equal to 4.5 mol%. In embodiments, the glass composition may include an amount of P2O5 less than or equal to 4.5 mol%, for example, less than or equal to 4.0 mol%, less than or equal to 3.5 mol%, less than or equal to 3.0 mol%, less than or equal to 2.5 mol%, less than or equal to 2.0 mol%, less than or equal to 1.5 mol%, less than or equal to 1.0 mol%, or less than or equal to 0.5 mol%. It should be understood that in various embodiments, any of the above ranges may be combined with any other range. In embodiments, the glass composition may include an amount of P2O5 greater than or equal to 0.5 mol% to less than or equal to 4.5 mol%, for example, greater than or equal to 1.0 mol% to less than or equal to 4.0 mol%, greater than or equal to 1.5 mol% to less than or equal to 3.5 mol%, or greater than or equal to 2.0 mol% to less than or equal to 3.0 mol%, and all ranges and subranges between the foregoing values.

[0027] Similar to SiO2, Al2O3, and P2O5, B2O3 can be added to glass compositions as a network forming agent, thereby reducing the meltability and formability of the glass composition. Therefore, B2O3 can be added in amounts that do not excessively degrade these properties. In embodiments, the glass composition may include amounts of B2O3 greater than or equal to 0.0 mol% to less than or equal to 8.0 mol%, as well as amounts within all ranges and subranges between the aforementioned values. In some embodiments, the glass composition may include an amount of B2O3 greater than or equal to 0.5 mol%, such as greater than or equal to 1.0 mol%, greater than or equal to 1.5 mol%, greater than or equal to 2.0 mol%, greater than or equal to 2.5 mol%, greater than or equal to 3.0 mol%, greater than or equal to 3.5 mol%, greater than or equal to 4.0 mol%, greater than or equal to 4.5 mol%, greater than or equal to 5.0 mol%, greater than or equal to 5.5 mol%, greater than or equal to 6.0 mol%, greater than or equal to 6.5 mol%, greater than or equal to 7.0 mol%, or greater than or equal to 7.5 mol%. In embodiments, the glass composition may include less than or equal to 7.5 mol% of B2O3, for example, less than or equal to 7.0 mol%, less than or equal to 6.5 mol%, less than or equal to 6.0 mol%, less than or equal to 5.5 mol%, less than or equal to 5.0 mol%, less than or equal to 4.5 mol%, less than or equal to 4.0 mol%, less than or equal to 3.5 mol%, less than or equal to 3.0 mol%, less than or equal to 2.5 mol%, less than or equal to 2.0 mol%, less than or equal to 1.5 mol%, less than or equal to 1.0 mol%, or less than or equal to 0.5 mol%. It should be understood that in various embodiments, any of the above ranges may be combined with any other range. In embodiments, the glass composition comprises an amount of B2O3 greater than or equal to 0.5 mol% to less than or equal to 7.5 mol%, for example greater than or equal to 1.0 mol% to less than or equal to 7.0 mol%, greater than or equal to 1.5 mol% to less than or equal to 6.5 mol%, greater than or equal to 2.0 mol% to less than or equal to 6.0 mol%, greater than or equal to 2.5 mol% to less than or equal to 5.5 mol%, or greater than or equal to 3.0 mol% to less than or equal to 5.0 mol%, as well as all ranges and subranges between the foregoing values.

[0028] In some embodiments, the glass composition includes at least one of B2O3 and P2O5 as a glass network forming element. Therefore, in embodiments, B2O3 + P2O5 is greater than 0.0 mol%, for example, greater than or equal to 0.5 mol%, greater than or equal to 1.0 mol%, greater than or equal to 1.5 mol%, greater than or equal to 2.0 mol%, greater than or equal to 2.5 mol%, greater than or equal to 3.0 mol%, greater than or equal to 3.5 mol%, greater than or equal to 4.0 mol%, greater than or equal to 4.5 mol%, greater than or equal to 5.0 mol%, greater than or equal to 5.5 mol%, greater than or equal to 6.0 mol%, greater than or equal to 6.5 mol%, greater than or equal to 7.0 mol%, greater than or equal to 7.5 mol%, or greater than or equal to 8.0 mol%, as well as all ranges and subranges between the foregoing values. In embodiments, B2O3+P2O5 is less than or equal to 7.5 mol%, for example less than or equal to 7.0 mol%, less than or equal to 6.5 mol%, less than or equal to 6.0 mol%, less than or equal to 5.5 mol%, less than or equal to 5.0 mol%, less than or equal to 4.5 mol%, less than or equal to 4.0 mol%, less than or equal to 3.5 mol%, less than or equal to 3.0 mol%, less than or equal to 2.5 mol%, less than or equal to 2.0 mol%, less than or equal to 1.5 mol%, less than or equal to 1.0 mol%, or less than or equal to 0.5 mol%. It should be understood that in various embodiments, any of the above ranges can be combined with any other range. In embodiments, the glass composition comprises an amount of B2O3+P2O5 greater than or equal to 0.5 mol% to less than or equal to 7.5 mol%, for example greater than or equal to 1.0 mol% to less than or equal to 7.0 mol%, greater than or equal to 1.5 mol% to less than or equal to 6.5 mol%, greater than or equal to 2.0 mol% to less than or equal to 6.0 mol%, greater than or equal to 2.5 mol% to less than or equal to 5.5 mol%, or greater than or equal to 3.0 mol% to less than or equal to 5.0 mol%, as well as all ranges and subranges between the foregoing values.

[0029] The role of Li₂O in glass compositions has been discussed above and will be further elaborated below. To some extent, the addition of lithium to glass allows for better control of the ion exchange process and further reduces the softening point of the glass. In embodiments, the glass composition typically comprises an amount of Li₂O greater than or equal to 5.0 mol% to less than or equal to 15.0 mol%, and amounts of Li₂O within all ranges and subranges between the aforementioned values. In some embodiments, the glass composition comprises 5.5 mol% or more of Li₂O, for example, 6.0 mol% or more, 6.5 mol% or more, 7.0 mol% or more, 7.5 mol% or more, 8.0 mol% or more, 8.5 mol% or more, 9.0 mol% or more, 9.5 mol% or more, 10.0 mol% or more, 10.5 mol% or more, 11.0 mol% or more, 11.5 mol% or more, 12.0 mol% or more, 12.5 mol% or more, 13.0 mol% or more, 13.5 mol% or more, 14.0 mol% or more, or 14.5 mol% or more. In some embodiments, the glass composition comprises less than or equal to 14.5 mol% of Li₂O, for example, less than or equal to 14.0 mol%, less than or equal to 13.5 mol%, less than or equal to 13.0 mol%, less than or equal to 12.5 mol%, less than or equal to 12.0 mol%, less than or equal to 11.5 mol%, less than or equal to 11.0 mol%, less than or equal to 10.5 mol%, less than or equal to 10.0 mol%, less than or equal to 9.5 mol%, less than or equal to 9.0 mol%, less than or equal to 8.5 mol%, less than or equal to 8.0 mol%, less than or equal to 7.5 mol%, less than or equal to 7.0 mol%, less than or equal to 6.5 mol%, less than or equal to 6.0 mol%, or less than or equal to 5.5 mol%. It should be understood that in each embodiment, any of the above ranges may be combined with any other range.In embodiments, the glass composition comprises an amount of Li₂O greater than or equal to 5.5 mol% to less than or equal to 14.5 mol%, for example greater than or equal to 6.0 mol% to less than or equal to 14.0 mol%, greater than or equal to 6.5 mol% to less than or equal to 13.5 mol%, greater than or equal to 7.0 mol% to less than or equal to 13.0 mol%, greater than or equal to 7.5 mol% to less than or equal to 12.5 mol%, greater than or equal to 8.0 mol% to less than or equal to 12.0 mol%, greater than or equal to 8.5 mol% to less than or equal to 11.5 mol%, or greater than or equal to 9.0 mol% to less than or equal to 10.0 mol%, as well as all ranges and subranges between the foregoing values.

[0030] In addition to being a glass network-forming component, Al₂O₃ also contributes to improving the ion exchangeability of the glass composition. Therefore, in embodiments, the amounts of Al₂O₃ and other ion-exchangeable components can be relatively high. For example, Li₂O is an ion-exchangeable component. In some embodiments, the amount of Al₂O₃ + Li₂O in the glass composition can be greater than 21.4 mol%, for example, greater than or equal to 22.0 mol%, greater than or equal to 22.5 mol%, greater than or equal to 23.0 mol%, greater than or equal to 23.5 mol%, greater than or equal to 24.0 mol%, greater than or equal to 24.5 mol%, greater than or equal to 25.0 mol%, greater than or equal to 25.5 mol%, or greater than or equal to 26.0 mol%, and all ranges and subranges between the foregoing values. In some embodiments, the amount of Al₂O₃ + Li₂O is less than or equal to 26.5 mol%, for example, less than or equal to 26.0 mol%, less than or equal to 25.5 mol%, less than or equal to 25.0 mol%, less than or equal to 24.5 mol%, less than or equal to 24.0 mol%, less than or equal to 23.5 mol%, less than or equal to 23.0 mol%, less than or equal to 22.5 mol%, or less than or equal to 22.0 mol%, as well as all ranges and sub-ranges between the foregoing values. It should be understood that in various embodiments, any of the foregoing ranges can be combined with any other range. In the embodiments, the amount of Al2O3+Li2O is greater than or equal to 21.5 mol% to less than or equal to 26.5 mol%, for example, greater than or equal to 22.0 mol% to less than or equal to 26.0 mol%, greater than or equal to 22.5 mol% to less than or equal to 25.5 mol%, greater than or equal to 23.0 mol% to less than or equal to 25.0 mol%, or greater than or equal to 23.5 mol% to less than or equal to 24.5 mol%, as well as all ranges and subranges between the foregoing values.

[0031] According to embodiments, the glass composition may also include an alkali metal oxide other than Li₂O, such as Na₂O. Na₂O contributes to the ion exchangeability of the glass composition and also increases the melting point and improves the formability of the glass composition. However, if too much Na₂O is added to the glass composition, the CTE may be too low and the melting point may be too high. In embodiments, the glass composition typically includes an amount of Na₂O greater than 4.0 mol% to less than or equal to 15 mol%, and amounts of Na₂O within all ranges and subranges between the foregoing values. In some embodiments, the glass composition comprises 4.5 mol% or more of Na₂O, for example, 5.0 mol% or more, 5.5 mol% or more, 6.0 mol% or more, 6.5 mol% or more, 7.0 mol% or more, 7.5 mol% or more, 8.0 mol% or more, 8.5 mol% or more, 9.0 mol% or more, 9.5 mol% or more, 10.0 mol% or more, 10.5 mol% or more, 11.0 mol% or more, 11.5 mol% or more, 12.0 mol% or more, 12.5 mol% or more, 13.0 mol% or more, 13.5 mol% or more, 14.0 mol% or more, or 14.5 mol% or more. In some embodiments, the glass composition comprises less than or equal to 14.5 mol% of Na₂O, for example, less than or equal to 14.0 mol%, less than or equal to 13.5 mol%, less than or equal to 13.0 mol%, less than or equal to 12.5 mol%, less than or equal to 12.0 mol%, less than or equal to 11.5 mol%, less than or equal to 11.0 mol%, less than or equal to 10.5 mol%, less than or equal to 10.0 mol%, less than or equal to 9.5 mol%, less than or equal to 9.0 mol%, less than or equal to 8.5 mol%, less than or equal to 8.0 mol%, less than or equal to 7.5 mol%, less than or equal to 7.0 mol%, less than or equal to 6.5 mol%, less than or equal to 6.0 mol%, less than or equal to 5.5 mol%, less than or equal to 5.0 mol%, or less than or equal to 4.5 mol%. It should be understood that in each embodiment, any of the above ranges may be combined with any other range.In embodiments, the glass composition comprises an amount of Na₂O greater than or equal to 4.5 mol% to less than or equal to 14.5 mol%, for example greater than or equal to 5.0 mol% to less than or equal to 14.0 mol%, greater than or equal to 5.5 mol% to less than or equal to 13.5 mol%, greater than or equal to 6.0 mol% to less than or equal to 13.0 mol%, greater than or equal to 6.5 mol% to less than or equal to 12.5 mol%, greater than or equal to 7.0 mol% to less than or equal to 12.0 mol%, greater than or equal to 7.5 mol% to less than or equal to 11.5 mol%, or greater than or equal to 8.0 mol% to less than or equal to 10.0 mol%, as well as all ranges and subranges between the foregoing values.

[0032] As described above, Al₂O₃ contributes to improving the ion exchangeability of the glass composition. Therefore, in embodiments, the amounts of Al₂O₃ and other ion-exchangeable components can be relatively high. For example, Li₂O and Na₂O are ion-exchangeable components. In some embodiments, the amount of Al₂O₃ + Li₂O + Na₂O in the glass composition can be greater than 25.0 mol%, for example, greater than or equal to 25.5 mol%, greater than or equal to 26.0 mol%, greater than or equal to 26.5 mol%, greater than or equal to 27.0 mol%, greater than or equal to 27.5 mol%, greater than or equal to 28.0 mol%, greater than or equal to 28.5 mol%, greater than or equal to 29.0 mol%, or greater than or equal to 29.5 mol%, and all ranges and subranges between the foregoing values. In some embodiments, the amount of Al₂O₃ + Li₂O + Na₂O is less than or equal to 30.0 mol%, for example, less than or equal to 29.5 mol%, less than or equal to 29.0 mol%, less than or equal to 28.5 mol%, less than or equal to 28.0 mol%, less than or equal to 27.5 mol%, less than or equal to 27.0 mol%, less than or equal to 26.5 mol%, less than or equal to 26.0 mol%, or less than or equal to 25.5 mol%, as well as all ranges and sub-ranges between the foregoing values. It should be understood that in various embodiments, any of the foregoing ranges can be combined with any other range. In the embodiments, the amount of Al2O3+Li2O+Na2O is greater than or equal to 25.0 mol% to less than or equal to 30.0 mol%, for example, greater than or equal to 25.5 mol% to less than or equal to 29.5 mol%, greater than or equal to 26.0 mol% to less than or equal to 29.0 mol%, greater than or equal to 26.5 mol% to less than or equal to 28.5 mol%, or greater than or equal to 27.0 mol% to less than or equal to 28.0 mol%, as well as all ranges and subranges between the foregoing values.

[0033] Similar to Na₂O, K₂O also promotes ion exchange and increases the DOC of the compressive stress layer. However, the addition of K₂O can result in an excessively low CTE and an excessively high melting point. In embodiments, the glass composition is potassium-free or substantially potassium-free. As used herein, the term "substantially potassium-free" means that the component is not added as a component of the batch, although the component may be present in the final glass as an impurity in very small amounts (e.g., less than 0.01 mol%). In embodiments, K₂O may be present in the glass composition in amounts less than 1 mol%.

[0034] MgO reduces the viscosity of glass, which improves formability, strain point, and Young's modulus, and can also improve ion exchange capacity. However, when too much MgO is added to the glass composition, the density and CTE of the glass composition increase. In embodiments, the glass composition typically comprises MgO at a concentration of greater than or equal to 0.0 mol% to less than or equal to 2.0 mol%, and at concentrations in all ranges and subranges between the foregoing values. In some embodiments, the glass composition comprises MgO in an amount greater than or equal to 0.2 mol%, such as greater than or equal to 0.4 mol%, greater than or equal to 0.6 mol%, greater than or equal to 0.8 mol%, greater than or equal to 1.0 mol%, greater than or equal to 1.2 mol%, greater than or equal to 1.4 mol%, greater than or equal to 1.6 mol%, or greater than or equal to 1.8 mol%. In some embodiments, the glass composition comprises less than or equal to 1.8 mol% of MgO, for example, less than or equal to 1.6 mol%, less than or equal to 1.4 mol%, less than or equal to 1.2 mol%, less than or equal to 1.0 mol%, less than or equal to 0.8 mol%, less than or equal to 0.6 mol%, less than or equal to 0.4 mol%, or less than or equal to 0.2 mol%. It should be understood that in various embodiments, any of the above ranges can be combined with any other range. In embodiments, the glass composition comprises more than or equal to 0.2 mol% to less than or equal to 1.8 mol% of MgO, for example, more than or equal to 0.4 mol% to less than or equal to 1.6 mol%, more than or equal to 0.6 mol% to less than or equal to 1.4 mol%, or more than or equal to 0.8 mol% to less than or equal to 1.2 mol%, and all ranges and subranges between the foregoing values.

[0035] CaO reduces the viscosity of glass, which improves formability, strain point, and Young's modulus, and can also improve ion exchange capacity. However, when too much CaO is added to the glass composition, the density and CTE of the glass composition increase. In embodiments, the glass composition typically comprises CaO at a concentration greater than or equal to 0.0 mol% to less than or equal to 3.0 mol%, and concentrations in all ranges and subranges between the aforementioned values. In some embodiments, the glass composition comprises an amount of CaO greater than or equal to 0.2 mol%, such as greater than or equal to 0.4 mol%, greater than or equal to 0.6 mol%, greater than or equal to 0.8 mol%, greater than or equal to 1.0 mol%, greater than or equal to 1.2 mol%, greater than or equal to 1.4 mol%, greater than or equal to 1.6 mol%, greater than or equal to 1.8 mol%, greater than or equal to 2.0 mol%, greater than or equal to 2.2 mol%, greater than or equal to 2.4 mol%, greater than or equal to 2.6 mol%, or greater than or equal to 2.8 mol%. In some embodiments, the glass composition comprises less than or equal to 2.8 mol% of CaO, for example, less than or equal to 2.6 mol%, less than or equal to 2.4 mol%, less than or equal to 2.2 mol%, less than or equal to 2.0 mol%, less than or equal to 1.8 mol%, less than or equal to 1.6 mol%, less than or equal to 1.4 mol%, less than or equal to 1.2 mol%, less than or equal to 1.0 mol%, less than or equal to 0.8 mol%, less than or equal to 0.6 mol%, less than or equal to 0.4 mol%, or less than or equal to 0.2 mol%. It should be understood that in various embodiments, any of the above ranges may be combined with any other range. In embodiments, the glass composition comprises an amount of CaO greater than or equal to 0.2 mol% to less than or equal to 2.8 mol%, for example greater than or equal to 0.4 mol% to less than or equal to 2.6 mol%, greater than or equal to 0.6 mol% to less than or equal to 2.4 mol%, or greater than or equal to 0.8 mol% to less than or equal to 2.2 mol%, greater than or equal to 1.0 mol% to less than or equal to 2.0 mol%, greater than or equal to 1.2 mol% to less than or equal to 1.8 mol%, or greater than or equal to 1.4 mol% to less than or equal to 1.6 mol%, and all ranges and subranges between the foregoing values.

[0036] In embodiments, the glass composition may optionally include one or more clarifying agents. In some embodiments, the clarifying agent may include, for example, SnO2. In such embodiments, SnO2 may be present in the glass composition in an amount less than or equal to 0.2 mol%, for example, greater than or equal to 0.0 mol% to less than or equal to 0.1 mol%, and all ranges and subranges between the foregoing values. In embodiments, SnO2 may be present in the glass composition in an amount greater than or equal to 0.0 mol% to less than or equal to 0.2 mol%, or greater than or equal to 0.1 mol% to less than or equal to 0.2 mol%, and all ranges and subranges between the foregoing values. In some embodiments, the glass composition may be SnO2-free or substantially SnO2-free.

[0037] ZnO enhances the ion exchange properties of glass, for example, by increasing the compressive stress of the glass. However, adding too much ZnO may increase density and lead to phase separation. In embodiments, the glass composition may include an amount of ZnO greater than or equal to 0.0 mol% to less than or equal to 1.5 mol%, for example, greater than or equal to 0.2 mol% to less than or equal to 1.0 mol%, and all ranges and subranges between the foregoing values. In some embodiments, the glass composition may include an amount of ZnO greater than or equal to 0.3 mol%, for example, greater than or equal to 0.4 mol%, or greater than or equal to 0.5 mol%. In embodiments, the glass composition may include an amount of ZnO less than or equal to 1.0 mol%, for example, less than or equal to 0.8 mol%, or less than or equal to 0.6 mol%. It should be understood that in various embodiments, any of the foregoing ranges may be combined with any other range.

[0038] SrO lowers the liquidus temperature of the glass articles disclosed herein. In embodiments, the glass composition may include an amount of SrO greater than or equal to 0.0 mol% to less than or equal to 1.5 mol%, for example, greater than or equal to 0.2 mol% to less than or equal to 1.0 mol%, and all ranges and subranges between the foregoing values. In some embodiments, the glass composition may include an amount of SrO greater than or equal to 0.2 mol% or greater than or equal to 0.4 mol%. In embodiments, the glass composition may include an amount of SrO less than or equal to 0.8 mol%, for example, less than or equal to 0.6 mol%, or less than or equal to 0.4 mol%. It should be understood that in various embodiments, any of the foregoing ranges may be combined with any other range.

[0039] In addition to the components described above, the glass composition according to the embodiments disclosed herein may include an amount of divalent cationic oxide (referred to herein as RO) greater than or equal to 0.0 mol% to less than or equal to 5.0 mol%, and amounts of RO in all ranges and subranges between the foregoing values. As used herein, divalent cationic oxide (RO) includes, but is not limited to, MgO, CaO, SrO, BaO, FeO, and ZnO. In some embodiments, the glass composition may include an amount of RO greater than or equal to 0.2 mol%, such as greater than or equal to 0.5 mol%, greater than or equal to 1.0 mol%, greater than or equal to 1.5 mol%, greater than or equal to 2.0 mol%, greater than or equal to 2.5 mol%, greater than or equal to 3.0 mol%, greater than or equal to 3.5 mol%, greater than or equal to 4.0 mol%, or greater than or equal to 4.5 mol%. In embodiments, the glass composition may include an amount of RO less than or equal to 4.5 mol%, such as less than or equal to 4.0 mol%, less than or equal to 3.5 mol%, less than or equal to 3.0 mol%, less than or equal to 2.5 mol%, less than or equal to 2.0 mol%, less than or equal to 1.5 mol%, less than or equal to 1.0 mol%, or less than or equal to 0.5 mol%. It should be understood that in each embodiment, any of the above ranges may be combined with any other range. In embodiments, the glass composition may include an amount of RO greater than or equal to 0.2 mol% to less than or equal to 4.5 mol%, such as greater than or equal to 0.5 mol% to less than or equal to 4.0 mol%, greater than or equal to 1.0 mol% to less than or equal to 3.5 mol%, greater than or equal to 1.5 mol% to less than or equal to 3.0 mol%, or greater than or equal to 2.0 mol% to less than or equal to 2.5 mol%, and all ranges and subranges between the foregoing values.

[0040] In embodiments, the mol% relationship of Al2O3 / (R2O+RO) is greater than 0.90, where RO is the sum of divalent cationic oxides and R2O is the sum of alkali metal oxides. As used herein, R2O includes Li2O, Na2O, K2O, Rb2O, Cs2O, and Fr2O. In embodiments, Al2O3 / (R2O+RO) is greater than 0.90 to less than 1.20. An increased Al2O3 to R2O+RO ratio improves the liquidus temperature and viscosity of the glass article. This ratio results in a denser glass that is less brittle and has higher damage resistance. In some embodiments, the molar ratio of Al2O3 / (R2O+RO) is greater than or equal to 0.95, for example, greater than or equal to 1.00, greater than or equal to 1.05, greater than or equal to 1.08, greater than or equal to 1.10, or greater than or equal to 1.15. In embodiments, the molar ratio of Al2O3 / (R2O+RO) is less than or equal to 1.20, for example, less than or equal to 1.50, less than or equal to 1.00, less than or equal to 0.98, less than or equal to 0.95, or less than or equal to 0.92. It should be understood that in various embodiments, any of the above ranges can be combined with any other range. In embodiments, the molar ratio of Al2O3 / (R2O+RO) is greater than or equal to 0.90 and less than or equal to 1.50, for example, greater than or equal to 0.95 and less than or equal to 1.20, greater than or equal to 0.98 and less than or equal to 1.15, or greater than or equal to 1.00 and less than or equal to 1.10, and all ranges and subranges between the aforementioned values.

[0041] In embodiments, the total amount of the network-forming component (e.g., Al₂O₃ + SiO₂ + B₂O₃ + P₂O₅) is greater than or equal to 80 mol%, for example, greater than or equal to 82 mol%, greater than or equal to 84 mol%, greater than or equal to 86 mol%, greater than or equal to 88 mol%, or greater than or equal to 90 mol%. A high amount of network-forming component increases the density of the glass, making it less brittle and improving its damage resistance. In embodiments, the total amount of the network-forming component is less than or equal to 94 mol%, for example, less than or equal to 92 mol%, less than or equal to 90 mol%, less than or equal to 88 mol%, less than or equal to 86 mol%, less than or equal to 84 mol%, or less than or equal to 82 mol%. It should be understood that in various embodiments, any of the above ranges can be combined with any other range. In an implementation, the total amount of the network-forming components is greater than or equal to 80 mol% to less than or equal to 94 mol%, for example, greater than or equal to 82 mol% to less than or equal to 92 mol%, greater than or equal to 84 mol% to less than or equal to 90 mol%, or greater than or equal to 86 mol% to less than or equal to 88 mol%, as well as all ranges and subranges between the aforementioned values.

[0042] In one or more embodiments, the alkali metal aluminosilicate glass article comprises, in mol% terms, a relationship of -8.00 ≤ R₂O + RO - Al₂O₃ – B₂O₃ – P₂O₅ ≤ -1.75. Without being bound by any particular theory, an excess of R₂O and RO in the glass composition can lead to a high concentration of non-bridging oxygen in the glass. The presence of excess non-bridging oxygen in the glass can result in reduced resistance to point contact damage. On the other hand, if the amount of non-bridging oxygen is too low, the melt quality of the glass is compromised. Therefore, in embodiments, it may be desirable to limit the amount of non-bridging oxygen in the glass composition rather than completely remove it. It is believed that Al₂O₃, B₂O₃, and P₂O₅ will react with the R₂O and RO components in the glass composition, thereby limiting the amount of non-bridging oxygen in the glass composition. Therefore, in embodiments, it may be desirable that the molar percentages of Al2O3, B2O3, and P2O5 in the glass composition are close to the molar percentages of R2O and RO in the glass composition, as reflected in the inequalities described above. In one or more embodiments, -7.50 ≤ R2O+RO-Al2O3–B2O3–P2O5 ≤ -2.50, for example -6.50 ≤ R2O+RO-Al2O3–B2O3–P2O5 ≤ -3.00, -5.50 ≤ R2O+RO-Al2O3–B2O3–P2O5 ≤ -3.50, or -4.50 ≤ R2O+RO-Al2O3–B2O3–P2O5 ≤ -3.50, and all ranges and subranges between the aforementioned values.

[0043] In one or more embodiments, the alkali metal aluminosilicate glass article comprises, in mol% terms, a relationship of 9.00 ≤ (SiO2 + Al2O3 + Li2O) / Na2O. Not bound by any particular theory, Na... + The cation has a higher concentration than Si 4+ Al 3+ and Li +Cations have lower field strengths, while glasses containing higher field strength cations typically have higher packing density, thus enabling higher stored tensile stress (CT). To improve CT, oxides with high field strength cations should be added relative to oxides with low field strength cations, but a certain amount of oxides with low field strength cations is also needed to lower the liquidus temperature. In embodiments, 9.00 ≤ (SiO2 + Al2O3 + Li2O) / Na2O ≤ 16.00, for example 9.20 ≤ (SiO2 + Al2O3 + Li2O) / Na2O ≤ 15.50, 9.50 ≤ (SiO2 + Al2O3 + Li2O) / Na2O ≤ 15.00, 10.00 ≤ (SiO2 + Al2O3 + Li2O) / Na2O ≤ 14.50, or 10.50 ≤ (SiO2 + Al2O3 + Li2O) / Na2O ≤ 14.00, and all ranges and subranges between the aforementioned values.

[0044] In some embodiments, the alkali metal aluminosilicate glass article comprises a ratio of (Li₂O + Al₂O₃ + P₂O₅) / (Na₂O + B₂O₃) ≤ 3.50 in mol%. Without being bound by any particular theory, it is believed that Na₂O modifier oxides are superior to Li₂O modifier oxides in improving free volume and corresponding resistance to indentation cracking. Similarly, B₂O₃ network-forming oxides are superior to Al₂O₃ and P₂O₅ network-forming oxides in improving free volume and corresponding resistance to indentation cracking. Therefore, in embodiments, it may be desirable to have an increased percentage of Na₂O and B₂O₃ relative to the amounts of Li₂O, Al₂O₃, and P₂O₅ in the glass composition. Therefore, in one or more embodiments, 1.50≤(Li2O+Al2O3+P2O5) / (Na2O+B2O3)≤3.50, for example 1.80≤(Li2O+Al2O3+P2O5) / (Na2O+B2O3)≤3.35, 2.00≤(Li2O+Al2O3+P2O5) / (Na2O+B2O3)≤3.20, 2.20≤(Li2O+Al2O3+P2O5) / (Na2O+B2O3)≤3.00, or 2.40≤(Li2O+Al2O3+P2O5) / (Na2O+B2O3)≤2.80, and all ranges and subranges between the aforementioned values.

[0045] In one or more embodiments, the amounts of Al2O3 and Li2O in the glass composition may be included relative to other glass network forming agents and Na2O to increase the glass's damage resistance without affecting CTE and glass formability. Therefore, in some embodiments, the glass composition has a mol% relationship of 1.00 ≤ (Li2O+Al2O3) / (Na2O+B2O3+P2O5) ≤ 2.75, for example 1.25 ≤ (Li2O+Al2O3) / (Na2O+B2O3+P2O5) ≤ 2.50, 1.50 ≤ (Li2O+Al2O3) / (Na2O+B2O3+P2O5) ≤ 2.25, or 1.75 ≤ (Li2O+Al2O3) / (Na2O+B2O3+P2O5) ≤ 2.00, and all ranges and subranges between the foregoing values.

[0046] In some embodiments, the amounts of Al2O3, B2O3, and P2O5 glass network forming components can be balanced with other components of the glass composition (e.g., R2O and RO). In some embodiments, the glass composition may have a mol% relationship of 1.0 < (Al2O3 + B2O3 + P2O5) / (R2O + RO), for example 1.0 < (Al2O3 + B2O3 + P2O5) / (R2O + RO) < 1.8, 1.1 < (Al2O3 + B2O3 + P2O5) / (R2O + RO) < 1.7, 1.2 < (Al2O3 + B2O3 + P2O5) / (R2O + RO) < 1.6, or 1.3 < (Al2O3 + B2O3 + P2O5) / (R2O + RO) < 1.5, and all ranges and subranges between the foregoing values.

[0047] In this embodiment, the glass article may be substantially free of one or both of arsenic and antimony.

[0048] In one embodiment, the glass composition may satisfy the following relationship in mol%: 6.96Al2O3–1.90B2O3+2.16CaO+3.30MgO–1.50Na2O+12.74Li2O–1.10SrO–14.50K2O–1.87La2O3+6.13ZrO2–76.40>50.00.

[0049] The physical properties of the alkali metal aluminosilicate glass compositions disclosed above will now be discussed. These physical properties can be achieved by varying the component content of the alkali metal aluminosilicate glass compositions, as will be discussed in more detail with reference to the examples.

[0050] The glass composition according to the embodiments may have a content greater than or equal to 2.20 g / cm³.3 Up to 2.50 g / cm³ 3 The density, for example, greater than or equal to 2.25 g / cm³. 3 Up to 2.50 g / cm³ 3 ≥2.30 g / cm 3 Up to 2.50 g / cm³ 3 ≥2.35 g / cm 3 Up to 2.50 g / cm³ 3 ≥2.40 g / cm³ 3 Up to 2.50 g / cm³ 3 or greater than or equal to 2.45 g / cm³ 3 Up to 2.50 g / cm³ 3 In an embodiment, the glass composition may have a concentration greater than or equal to 2.20 g / cm³. 3 Up to 2.45 g / cm³ 3 The density, for example, greater than or equal to 2.20 g / cm³. 3 Up to 2.40 g / cm³ 3 ≥2.20 g / cm³ 3 Up to 2.35 g / cm³ 3 ≥2.20 g / cm³ 3 Up to 2.30 g / cm³ 3 or greater than or equal to 2.20 g / cm³ 3 Up to 2.25 g / cm³ 3 , and all ranges and subranges between the aforementioned values. Typically, in alkali metal aluminosilicate glass compositions, with elements such as Na... + or K + Larger, denser alkali metal cations, such as Li, are... + The substitution of smaller alkali metal cations, such as lithium, reduces the density of the glass composition. Therefore, the higher the amount of lithium in the glass composition, the less dense the glass composition will be. The density values ​​described in this disclosure refer to values ​​measured by the buoyancy method according to ASTM C693-93 (2013).

[0051] In embodiments, the liquid phase viscosity is less than or equal to 1000 kP, for example, less than or equal to 800 kP, less than or equal to 600 kP, less than or equal to 400 kP, less than or equal to 200 kP, less than or equal to 100 kP, or less than or equal to 75 kP. In embodiments, the liquid phase viscosity is greater than or equal to 20 kP, for example, greater than or equal to 40 kP, greater than or equal to 60 kP, greater than or equal to 80 kP, greater than or equal to 100 kP, greater than or equal to 120 kP, greater than or equal to 140 kP, or greater than or equal to 160 kP. It should be understood that in each embodiment, any of the above ranges can be combined with any other range. In this embodiment, the liquid phase viscosity is greater than or equal to 20 kP and less than or equal to 1000 kP, for example, greater than or equal to 40 kP and less than or equal to 900 kP, greater than or equal to 60 kP and less than or equal to 800 kP, or greater than or equal to 80 kP and less than or equal to 700 kP, as well as all ranges and subranges between the foregoing values. The liquid phase viscosity is measured according to ASTM C829-81 (2010).

[0052] Adding lithium to a glass composition also affects its Young's modulus, shear modulus, and Poisson's ratio. In embodiments, the Young's modulus of the glass composition can be greater than or equal to 65 GPa and less than or equal to 85 GPa, for example, greater than or equal to 67 GPa and less than or equal to 82 GPa, greater than or equal to 70 GPa and less than or equal to 80 GPa, greater than or equal to 72 GPa and less than or equal to 78 GPa, or greater than or equal to 74 GPa and less than or equal to 76 GPa, as well as all ranges and subranges between the foregoing values. In other embodiments, the Young's modulus of the glass composition can be greater than or equal to 66 GPa and less than or equal to 85 GPa, for example, greater than or equal to 68 GPa and less than or equal to 85 GPa, greater than or equal to 70 GPa and less than or equal to 85 GPa, greater than or equal to 72 GPa and less than or equal to 85 GPa, greater than or equal to 74 GPa and less than or equal to 85 GPa, greater than or equal to 76 GPa and less than or equal to 85 GPa, greater than or equal to 78 GPa and less than or equal to 85 GPa, greater than or equal to 80 GPa and less than or equal to 85 GPa, or greater than or equal to 82 GPa and less than or equal to 85 GPa, as well as all ranges and subranges between the foregoing values. In embodiments, the Young's modulus can be greater than or equal to 65 GPa and less than or equal to 84 GPa, for example, greater than or equal to 65 GPa and less than or equal to 82 GPa, greater than or equal to 65 GPa and less than or equal to 80 GPa, greater than or equal to 65 GPa and less than or equal to 78 GPa, greater than or equal to 65 GPa and less than or equal to 76 GPa, greater than or equal to 65 GPa and less than or equal to 74 GPa, greater than or equal to 65 GPa and less than or equal to 72 GPa, greater than or equal to 65 GPa and less than or equal to 70 GPa, greater than or equal to 65 GPa and less than or equal to 68 GPa, or greater than or equal to 65 GPa and less than or equal to 10 GPa, as well as all ranges and subranges between the foregoing values. The Young's modulus values ​​described in this disclosure refer to values ​​measured using the general type of resonant ultrasonic spectroscopy technique described in ASTM E2001-13, entitled "Standard Guide to Resonant Ultrasonic Spectroscopy for Defect Detection in Metallic and Nonmetallic Parts".

[0053] According to some embodiments, the glass composition may have a shear modulus greater than or equal to 25 GPa to less than or equal to 35 GPa, for example greater than or equal to 26 GPa to less than or equal to 34 GPa, greater than or equal to 27 GPa to less than or equal to 33 GPa, greater than or equal to 28 GPa to less than or equal to 32 GPa, or greater than or equal to 29 GPa to less than or equal to 31 GPa, as well as all ranges and subranges between the aforementioned values. In embodiments, the glass composition may have a shear modulus greater than or equal to 26 GPa to less than or equal to 35 GPa, for example greater than or equal to 27 GPa to less than or equal to 35 GPa, greater than or equal to 28 GPa to less than or equal to 35 GPa, greater than or equal to 29 GPa to less than or equal to 35 GPa, greater than or equal to 30 GPa to less than or equal to 35 GPa, greater than or equal to 31 GPa to less than or equal to 35 GPa, greater than or equal to 32 GPa to less than or equal to 35 GPa, greater than or equal to 33 GPa to less than or equal to 35 GPa, or greater than or equal to 34 GPa to less than or equal to 35 GPa, as well as all ranges and subranges between the aforementioned values. In embodiments, the glass composition may have a shear modulus greater than or equal to 25 GPa and less than or equal to 34 GPa, for example, greater than or equal to 25 GPa and less than or equal to 33 GPa, greater than or equal to 25 GPa and less than or equal to 32 GPa, greater than or equal to 25 GPa and less than or equal to 31 GPa, greater than or equal to 25 GPa and less than or equal to 30 GPa, greater than or equal to 25 GPa and less than or equal to 29 GPa, greater than or equal to 25 GPa and less than or equal to 28 GPa, greater than or equal to 25 GPa and less than or equal to 27 GPa, or greater than or equal to 25 GPa and less than or equal to 26 GPa, as well as all ranges and subranges between the foregoing values. The shear modulus values ​​described in this disclosure refer to values ​​measured using the general type of resonant ultrasonic spectroscopy technique described in ASTM E2001-13, entitled "Standard Guide to Resonant Ultrasonic Spectroscopy for Defect Detection in Metallic and Nonmetallic Parts".

[0054] Based on the above description, the glass composition according to the embodiments can be formed by any suitable method, such as slot forming, float forming, rolling process, melt forming process, etc.

[0055] A glass article may be characterized by its method of formation. For example, a glass article may be characterized by being float-formable (i.e., formed by the float process), draw-formable, and especially melt-formable or slot-drawable (i.e., formed by a draw process such as melt drawing or slot drawing).

[0056] The glass articles described in some embodiments herein can be formed using a draw process. The draw process produces glass articles with a uniform thickness and a relatively clean surface. Because the average flexural strength of a glass article is controlled by the number and size of surface imperfections, a clean surface with minimal contact has higher initial strength. Furthermore, draw glass articles have a very flat and smooth surface, eliminating the need for expensive grinding and polishing before use in their final applications.

[0057] Some embodiments of the glass article can be described as melt-formable (i.e., formable using a melt-drawing process). The melt-drawing process uses a drawing trough having channels for receiving molten glass material. These channels have weirs that open at the top along the length of the channel on both sides. When the channel is filled with molten material, the molten glass overflows the weirs. Due to gravity, the molten glass flows down the outer surfaces of the drawing trough as two flowing glass films. These outer surfaces of the drawing trough extend downwards and inwards such that they join at the lower edge of the drawing trough. The two flowing glass films join at this edge to fuse and form a single flowing glass article. An advantage of the melt-drawing method is that, because the two glass films flowing through the channel fuse together, the outer surface of the resulting glass article does not contact any part of the equipment. Therefore, the surface properties of the melt-drawn glass article are not affected by this contact.

[0058] Glass articles described in some embodiments herein can be formed using a slit drawing process. The slit drawing process differs from molten drawing. In the slit drawing process, molten raw glass is fed into a drawing trough. The bottom of the drawing trough has a slot with a nozzle that extends the length of the trough. The molten glass flows through the slit / nozzle and is drawn downwards into a continuous glass article and into an annealing zone.

[0059] In one or more embodiments, the glass articles described herein may exhibit an amorphous microstructure and may be substantially free of crystals or microcrystals. In other words, in some embodiments, the glass articles do not include glass-ceramic materials.

[0060] As described above, in the embodiments, the alkali metal aluminosilicate glass composition can be strengthened, for example, through ion exchange, so that the glass has damage resistance for applications such as, but not limited to, glass for display screen covers. Reference Figure 1 The glass has a first region under compressive stress (e.g., Figure 1 The first compression layer 120 and the second compression layer 122 extend from the surface to the compression depth (DOC) of the glass; and the second region (e.g., Figure 1The central region (130) extends from the DOC to the center or interior region of the glass under tensile stress or central tension (CT). As used herein, DOC refers to the depth at which the stress in a glass article changes from compression to tension. At the DOC, the stress transitions from positive (compressive) stress to negative (tensile) stress, thus exhibiting a stress value of 0.

[0061] According to conventions commonly used in the art, compressive or tensile stress is expressed as negative (<0) stress, and tensile or tensile stress is expressed as positive (>0) stress. However, throughout this specification, CS is expressed as a positive or absolute value, i.e., as stated herein, CS = |CS|. Compressive stress (CS) has a maximum value at or near the glass surface, and CS varies as a function of distance d from the surface. See again Figure 1 The first segment 120 extends from the first surface 110 to a depth d1, and the second segment 122 extends from the second surface 112 to a depth d2. These segments together define the compressive stress, or CS, of the glass 100. The compressive stress (including the surface CS) is measured using a surface stress meter (FSM) with a commercially available instrument, such as the FSM-6000 manufactured by Orihara Industries, Ltd. (Japan). The surface stress measurement depends on the accurate measurement of the stress optical coefficient (SOC), which is related to the birefringence of the glass. The SOC is measured sequentially according to Procedure C (glass disk method) as described in ASTM Standard C770-16, entitled "Standard Test Method for Measurement of Stress-Optical Coefficient of Glass," the contents of which are incorporated herein by reference in their entirety.

[0062] In some implementations, CS is greater than or equal to 400 MPa and less than or equal to 800 MPa, for example, greater than or equal to 425 MPa and less than or equal to 775 MPa, greater than or equal to 450 MPa and less than or equal to 750 MPa, greater than or equal to 475 MPa and less than or equal to 725 MPa, greater than or equal to 500 MPa and less than or equal to 700 MPa, greater than or equal to 525 MPa and less than or equal to 675 MPa, greater than or equal to 550 MPa and less than or equal to 650 MPa, or greater than or equal to 575 MPa and less than or equal to 625 MPa, as well as all ranges and subranges between the aforementioned values.

[0063] In one or more embodiments, Na + and K + Ions are exchanged into the glass, and Na + Ion ratio K + Ions diffuse deeper into the glass. K +The depth of ion penetration (“potassium DOL”) differs from DOC because it represents the depth of potassium penetration during ion exchange. For the articles described herein, potassium DOL is typically less than DOC. Potassium DOL is measured using a surface stress meter, such as the commercially available FSM-6000 surface stress meter manufactured by Orihara Industries, Ltd. (Japan), depending on the accurate measurement of the stress optical coefficient (SOC), as described above in the reference CS measurement. The potassium DOL for each of the first compression layer 120 and the second compression layer 122 is greater than or equal to 5 μm and less than or equal to 30 μm, for example, greater than or equal to 6 μm and less than or equal to 25 μm, greater than or equal to 7 μm and less than or equal to 20 μm, greater than or equal to 8 μm and less than or equal to 15 μm, or greater than or equal to 9 μm and less than or equal to 10 μm, as well as all ranges and subranges between the aforementioned values. In one embodiment, the potassium DOL of each of the first compression layer 120 and the second compression layer 122 is greater than or equal to 6 μm and less than or equal to 30 μm, for example, greater than or equal to 10 μm and less than or equal to 30 μm, greater than or equal to 15 μm and less than or equal to 30 μm, greater than or equal to 20 μm and less than or equal to 30 μm, or greater than or equal to 25 μm and less than or equal to 30 μm, and all ranges and subranges between the aforementioned values. In another embodiment, the potassium DOL of each of the first compression layer 120 and the second compression layer 122 is greater than or equal to 5 μm and less than or equal to 25 μm, for example, greater than or equal to 5 μm and less than or equal to 20 μm, greater than or equal to 5 μm and less than or equal to 15 μm, or greater than or equal to 5 μm and less than or equal to 10 μm, and all ranges and subranges between the aforementioned values.

[0064] Two main surfaces ( Figure 1The compressive stresses at 110 and 112 in the glass are balanced by the tension stored in the central region (130) of the glass. The maximum central tension (CT) and DOC value are measured using a scattered light polarizer (SCALP) technique known in the art. The refractive near-field (RNF) method or SCALP can be used to measure the stress distribution. When measuring the stress distribution using the RNF method, the maximum CT value provided by SCALP is used for the RNF method. Specifically, the stress distribution measured by the RNF is force-balanced and calibrated to the maximum CT value provided by the SCALP measurement. The RNF method is described in U.S. Patent No. 8,854,623, entitled “System and Method for Measuring Distribution Characteristics of Glass Samples,” the entire contents of which are incorporated herein by reference. Specifically, the RNF method involves placing the glass article near a reference block, generating a polarization-switched beam that switches between orthogonal polarizations at a rate between 1 Hz and 50 Hz, measuring the power quantity in the polarization-switched beam, and generating a polarization-switched reference signal, wherein the power quantity measured in each orthogonal polarization is within 50% of each other. The method further includes transmitting a polarization-switched beam through a glass sample and a reference block at different depths into the glass sample, then using a relay optics system to relay the transmitted polarization-switched beam to a signal photodetector, and using the signal photodetector to generate a polarization-switched detector signal. The method also includes dividing the detector signal by the reference signal to form a normalized detector signal, and determining the distribution characteristics of the glass sample from the normalized detector signal.

[0065] In some embodiments, the glass composition may have a maximum CT greater than or equal to 60 MPa, such as greater than or equal to 70 MPa, greater than or equal to 80 MPa, greater than or equal to 90 MPa, greater than or equal to 100 MPa, greater than or equal to 110 MPa, greater than or equal to 120 MPa, greater than or equal to 130 MPa, greater than or equal to 140 MPa, or greater than or equal to 150 MPa, and all ranges and subranges between the aforementioned values. In some embodiments, the glass composition may have a maximum CT less than or equal to 200 MPa, such as less than or equal to 190 MPa, less than or equal to 180 MPa, less than or equal to 170 MPa, less than or equal to 160 MPa, less than or equal to 150 MPa, less than or equal to 140 MPa, less than or equal to 130 MPa, less than or equal to 120 MPa, less than or equal to 110 MPa, less than or equal to 100 MPa, less than or equal to 90 MPa, or less than or equal to 80 MPa, and all ranges and subranges between the aforementioned values. It should be understood that, in each embodiment, any of the above ranges can be combined with any other range. In embodiments, the glass composition may have a maximum CT greater than or equal to 60 MPa and less than or equal to 200 MPa, for example greater than or equal to 70 MPa and less than or equal to 190 MPa, greater than or equal to 80 MPa and less than or equal to 180 MPa, greater than or equal to 90 MPa and less than or equal to 170 MPa, greater than or equal to 100 MPa and less than or equal to 160 MPa, greater than or equal to 110 MPa and less than or equal to 150 MPa, or greater than or equal to 120 MPa and less than or equal to 140 MPa, as well as all ranges and subranges between the foregoing values.

[0066] As described above, the Depth of Compression (DOC) is measured using a Scattered Light Polarizing Mirror (SCALP) technique known in the art. In some embodiments herein, the DOC is provided as a portion of the thickness (t) of the glass article. In embodiments, the glass composition may have a Depth of Compression (DOC) greater than or equal to 0.15t and less than or equal to 0.25t, for example, greater than or equal to 0.18t and less than or equal to 0.22t, or greater than or equal to 0.19t and less than or equal to 0.21t, and all ranges and subranges between the foregoing values. In embodiments, the glass composition may have a DOC greater than or equal to 0.16t and less than or equal to 0.2t, for example greater than or equal to 0.17t and less than or equal to 0.25t, greater than or equal to 0.18t and less than or equal to 0.25t, greater than or equal to 0.19t and less than or equal to 0.25t, greater than or equal to 0.20t and less than or equal to 0.25t, greater than or equal to 0.21t and less than or equal to 0.25t, greater than or equal to 0.22t and less than or equal to 0.25t, greater than or equal to 0.23t and less than or equal to 0.25t, or greater than or equal to 0.24t and less than or equal to 0.25t, as well as all ranges and subranges between the aforementioned values. In embodiments, the glass composition may have a DOC greater than or equal to 0.15t and less than or equal to 0.24t, for example greater than or equal to 0.15t and less than or equal to 0.23t, greater than or equal to 0.15t and less than or equal to 0.22t, greater than or equal to 0.15t and less than or equal to 0.21t, greater than or equal to 0.15t and less than or equal to 0.20t, greater than or equal to 0.15t and less than or equal to 0.19t, greater than or equal to 0.15t and less than or equal to 0.18t, greater than or equal to 0.15t and less than or equal to 0.17t, or greater than or equal to 0.15t and less than or equal to 0.16t, as well as all ranges and subranges between the aforementioned values.

[0067] By exposing glass to an ion-exchange solution, a compressive stress layer can be formed in the glass. In some embodiments, the ion-exchange solution may be molten nitrate. In some embodiments, the ion-exchange solution may be molten KNO3, molten NaNO3, or a combination thereof. In some embodiments, the ion-exchange solution may include about 90% molten KNO3, about 80% molten KNO3, about 70% molten KNO3, about 60% molten KNO3, or about 50% molten KNO3. In some embodiments, the ion-exchange solution may include about 10% molten NaNO3, about 20% molten NaNO3, about 30% molten NaNO3, or about 40% molten NaNO3. In embodiments, the ion exchange solution may comprise about 80% molten KNO3 and about 20% molten NaNO3, about 75% molten KNO3 and about 25% molten NaNO3, about 70% molten KNO3 and about 30% molten NaNO3, about 65% molten KNO3 and about 35% molten NaNO3, or about 60% molten KNO3 and about 40%, and all ranges and subranges between the foregoing values. In embodiments, other sodium and potassium salts may be used in the ion exchange solution, such as, for example, sodium nitrite or potassium nitrite, phosphates, or sulfates. In some embodiments, the ion exchange solution may include lithium salts, such as LiNO3.

[0068] Glass compositions can be exposed to ion exchange solutions by immersing glass articles made of the glass composition in an ion exchange solution bath, spraying the ion exchange solution onto the glass articles made of the glass composition, or otherwise physically applying the ion exchange solution to the glass articles made of the glass composition. When exposed to the glass composition, according to embodiments, the ion exchange solution can be at a temperature greater than or equal to 400°C and less than or equal to 500°C, for example, greater than or equal to 410°C and less than or equal to 490°C, greater than or equal to 420°C and less than or equal to 480°C, greater than or equal to 430°C and less than or equal to 470°C, or greater than or equal to 440°C and less than or equal to 460°C, and all ranges and subranges between the aforementioned values. In embodiments, the glass composition may be exposed to an ion-exchange solution for a duration of greater than or equal to 4 hours and less than or equal to 48 hours, for example, greater than or equal to 8 hours and less than or equal to 44 hours, greater than or equal to 12 hours and less than or equal to 40 hours, greater than or equal to 16 hours and less than or equal to 36 hours, greater than or equal to 20 hours and less than or equal to 32 hours, or greater than or equal to 24 hours and less than or equal to 28 hours, as well as all ranges and subranges between the aforementioned values.

[0069] Ion exchange processes can be carried out in ion exchange solutions under treatment conditions that provide improved compressive stress distribution, for example, as disclosed in U.S. Patent Application Publication No. 2016 / 0102011, which is incorporated herein by reference in its entirety.

[0070] After the ion exchange process, it should be understood that the composition at the surface of the glass article can differ from that of the virgin (as-formed) glass article (i.e., the glass article before undergoing the ion exchange process). This is because, in the virgin glass, there are components such as, for example, Li... + Or Na + An alkali metal ion is respectively reacted with, for example, Na + or K + The glass composition is replaced by larger alkali metal ions. However, in embodiments, the glass composition at or near the center of the depth of the glass article will still have the composition of the original (non-ion-exchanged) glass used to form the glass article.

[0071] The glass articles disclosed herein may be incorporated into another article, such as articles having a display (or display articles) (e.g., consumer electronics, including mobile phones, tablets, computers, navigation systems, etc.), building articles, transportation articles (e.g., automobiles, trains, airplanes, marine vessels, etc.), appliance articles, or any article requiring a certain degree of transparency, scratch resistance, abrasion resistance, or a combination thereof. Exemplary articles containing any glass articles disclosed herein are shown in [illustration / example]. Figure 2A and Figure 2B In China. Specifically, Figure 2A and 2B A consumer electronic device 200 is shown, comprising: a housing 202 having a front surface 204, a rear surface 206, and side surfaces 208; electrical components (not shown) at least partially or completely located within the housing, and including at least a controller, memory, and a display 210 located at or near the front surface of the housing; and a cover substrate 212 located on or above the front surface of the housing such that it is positioned above the display. In some embodiments, a portion of the cover substrate 212 and / or a portion of the housing 202 may include any glasswork disclosed herein.

[0072] The first claim includes a glass composition comprising: 55.0 mol% to 70.0 mol% of SiO2; 12.0 mol% to 20.0 mol% of Al2O3; 5.0 mol% to 15.0 mol% of Li2O; and 4.0 mol% to 15.0 mol% of Na2O, wherein: -8.00 mol% ≤ R2O+RO–Al2O3–B2O3–P2O5 ≤ -1.75 mol%, 9.00 ≤ (SiO2+Al2O3+Li2O) / Na2O, and (Li2O+Al2O3+P2O5) / (Na2O+B2O3) ≤ 3.50.

[0073] The second item comprises the glass composition as described in the first item, wherein -7.50 mol% ≤ R2O + RO–Al2O3–B2O3–P2O5 ≤ -2.50 mol%.

[0074] The third item comprises a glass composition as described in any one of the first and second items, wherein 9.00 ≤ (SiO2 + Al2O3 + Li2O) / Na2O ≤ 16.00.

[0075] The fourth item comprises a glass composition as described in any one of the first to third items, wherein 9.20 ≤ (SiO2 + Al2O3 + Li2O) / Na2O ≤ 15.50.

[0076] The fifth item comprises a glass composition as described in any one of the first to fourth items, wherein 1.50 ≤ (Li2O+Al2O3+P2O5) / (Na2O+B2O3) ≤ 3.50.

[0077] The sixth item comprises a glass composition as described in any one of the first to fifth items, wherein 1.80 ≤ (Li2O+Al2O3+P2O5) / (Na2O+B2O3) ≤ 3.35.

[0078] The seventh item comprises a glass composition as described in any one of items one through six, wherein the B2O3+P2O5 content is greater than 0.0 mol%.

[0079] The eighth item comprises a glass composition as described in any one of the first to seventh items, wherein 1.00 ≤ (Li2O+Al2O3) / (Na2O+B2O3+P2O5) ≤ 2.75.

[0080] The ninth item comprises a glass composition as described in any one of items one through eight, wherein Al₂O₃ + Li₂O is greater than 21.4 mol%.

[0081] The tenth item comprises a glass composition as described in any one of items one through nine, wherein Al₂O₃ + Li₂O + Na₂O is greater than 25.0 mol%.

[0082] The eleventh item comprises a glass composition as described in any one of items one through ten, wherein 0.90 <Al2O3 / (R2O+RO)<1.20。

[0083] The twelfth item comprises a glass composition as described in any one of the first to eleventh items, wherein 1.0 < (Al2O3+B2O3+P2O5) / (R2O+RO).

[0084] The thirteenth item comprises a glass composition as described in any one of items one through twelve, wherein 6.96Al₂O₃–1.90B₂O₃+2.16CaO+3.30MgO–1.50Na₂O+12.74Li₂O–1.10SrO–14.50K₂O–1.87La₂O₃+6.13ZrO₂–76.40mol% >50.00mol%.

[0085] The fourteenth item includes a glass article comprising: a first surface; a second surface opposite to the first surface, wherein the thickness (t) of the glass article is expressed as the distance between the first surface and the second surface; and a compressive stress layer extending from at least one of the first surface and the second surface to the thickness (t) of the glass article, wherein the central tension of the glass article is greater than or equal to 60 MPa, the compressive stress layer has a compression depth greater than or equal to 0.15 t and less than or equal to 0.25 t, and the glass article is formed of glass comprising: greater than or equal to 55.0 mol% and less than or equal to 7 0.0 mol% SiO2; greater than or equal to 12.0 mol% to less than or equal to 20.0 mol% Al2O3; greater than or equal to 5.0 mol% to less than or equal to 15.0 mol% Li2O; and greater than or equal to 4.0 mol% to less than or equal to 15.0 mol% Na2O, wherein: -8.00 mol% ≤ R2O+RO–Al2O3–B2O3–P2O5 ≤ -1.75 mol%, 9.00 ≤ (SiO2+Al2O3+Li2O) / Na2O, and (Li2O+Al2O3+P2O5) / (Na2O+B2O3) ≤ 3.50.

[0086] The fifteenth item includes glass articles as described in the fourteenth item, wherein the center tension of the glass article is greater than or equal to 80 MPa.

[0087] The sixteenth item includes a glass article as described in any one of the fourteenth and fifteenth items, wherein the center tension of the glass article is greater than or equal to 90 MPa.

[0088] The seventeenth item includes a glass article as described in any one of items fourteen to sixteen, wherein the compression depth of the compressive stress layer is greater than or equal to 0.18t and less than or equal to 0.22t.

[0089] The eighteenth item includes glass articles as described in any one of items fourteen to seventeen, wherein the liquid phase viscosity of the glass article is greater than or equal to 20 kP and less than 1000 kP.

[0090] The nineteenth item includes a consumer electronic product comprising: a housing including a front surface, a rear surface and a side surface; electrical components located at least partially within the housing, the electrical components including at least a controller, a memory and a display, the display being located at or near the front surface of the housing; and a cover substrate disposed above the display, wherein at least a portion of at least one of the housing and the cover substrate comprises glass as described in any one of the fourteenth to eighteenth items.

[0091] The twentieth item includes a glass article comprising: a first surface; a second surface opposite to the first surface, wherein the thickness (t) of the glass article is expressed as the distance between the first surface and the second surface; and a compressive stress layer extending from at least one of the first surface and the second surface to the thickness (t) of the glass article, wherein the central tension of the glass article is greater than or equal to 60 MPa, the compressive stress layer has a compression depth greater than or equal to 0.15 t and less than or equal to 0.25 t, and the glass article has a composition at the central depth of the glass article comprising: greater than or equal to 55.0 mol% and less than 0.25 mol%. The content of SiO2 is greater than or equal to 70.0 mol%; Al2O3 is greater than or equal to 12.0 mol% and less than or equal to 20.0 mol%; Li2O is greater than or equal to 5.0 mol% and less than or equal to 15.0 mol%; and Na2O is greater than or equal to 4.0 mol% and less than or equal to 15.0 mol%, wherein: -8.00 mol% ≤ R2O+RO–Al2O3–B2O3–P2O5 ≤ -1.75 mol%, 9.00 ≤ (SiO2+Al2O3+Li2O) / Na2O, and (Li2O+Al2O3+P2O5) / (Na2O+B2O3) ≤ 3.50.

[0092] The twenty-first claim includes a glass composition comprising: 60.0 mol% to 70.0 mol% of SiO2; 12.0 mol% to 18.0 mol% of Al2O3; 5.0 mol% to 10.0 mol% of Li2O; 4.0 mol% to 10.0 mol% of Na2O; and 0.75 mol% of P2O5, wherein: the Li2O / Na2O ratio is greater than or equal to 1.00, and the Al2O3 + Li2O content is less than or equal to 25.25 mol%.

[0093] The twenty-second claim includes a glass article comprising: a first surface; a second surface opposite to the first surface, wherein the thickness (t) of the glass article is expressed as the distance between the first surface and the second surface; and a compressive stress layer extending from at least one of the first surface and the second surface to the thickness (t) of the glass article, wherein the central tension of the glass article is greater than or equal to 60 MPa, the compressive stress layer has a compression depth greater than or equal to 0.15 t and less than or equal to 0.25 t, and the glass article is formed of glass according to the twenty-first claim.

[0094] Item 23 includes glass articles as described in Item 22, wherein the center tension of the glass article is greater than or equal to 80 MPa.

[0095] Item 24 includes a glass article as described in any one of Items 22 and 23, wherein the center tension of the glass article is greater than or equal to 90 MPa.

[0096] The 25th item includes a glass article as described in any one of the 22nd to 24th items, wherein the compression depth of the compressive stress layer is greater than or equal to 0.18t and less than or equal to 0.22t.

[0097] The twenty-sixth item includes glass articles as described in any one of the twenty-two to twenty-five items, wherein the liquid phase viscosity of said glass is greater than or equal to 20 kP and less than 1000 kP.

[0098] The twenty-seventh item includes a consumer electronic product comprising: a housing including a front surface, a rear surface, and a side surface; electrical components located at least partially within the housing, the electrical components including at least a controller, a memory, and a display, the display being located at or near the front surface of the housing; and a cover substrate disposed above the display, wherein at least a portion of at least one of the housing and the cover substrate comprises glass as described in any one of the twenty-two to twenty-six items.

[0099] Example

[0100] The following examples further illustrate the implementation methods. It should be understood that these examples are not limited to the implementation methods described above.

[0101] Glass compositions having the components listed in Table 1 below were prepared by conventional glass-forming methods. In Table 1, all components are expressed in mol%, and various properties of the glass compositions were measured according to the methods disclosed in this specification.

[0102] Table 1

[0103] sample 1 2 3 4 <![CDATA[SiO2]]> 64.94 63.55 63.22 61.97 <![CDATA[Al2O3]]> 16.26 16.12 16.09 15.69 <![CDATA[Li2O]]> 7.67 7.18 7.20 7.01 <![CDATA[Na2O]]> 7.94 9.34 9.26 9.11 <![CDATA[K2O]]> MgO 0.51 0.22 0.21 0.21 ZnO CaO SrO <![CDATA[B2O3]]> 0.00 0.94 1.37 3.47 <![CDATA[P2O5]]> 2.46 2.47 2.46 2.37 <![CDATA[SnO2]]> 0.05 0.05 0.05 0.05 total 100 100 100 100 <![CDATA[Al2O3 / (R2O+RO)]]> 1.01 0.96 0.97 0.96 <![CDATA[Al2O3+Li2O]]> 23.93 23.30 23.29 22.70 <![CDATA[Na2O+Li2O+Al2O3+RO]]> 32.38 32.86 32.76 32.02 <![CDATA[Al2O3+MgO+ZnO]]> 16.77 16.34 16.30 15.90 <![CDATA[Al2O3+B2O3]]> 16.26 17.06 17.46 19.16 <![CDATA[(Al2O3+B2O3+P2O5) / (R2O+RO)]]> 1.16 1.17 1.19 1.32

[0104] Table 1 - Continuation

[0105] sample 1 2 3 4 VFT viscosity coefficient A -3.66 -3.55 -3.41 -3.18 B 9500.8 9429.9 9138.3 8488.6 To 67.7 14.9 38.2 40.2 Temperature (P) at a constant viscosity 200 1661 1628 1638 1589 35000 1226 1181 1187 1139 200000 1128 1081 1087 1041 <![CDATA[10 11 Poise temperature (°C) <![CDATA[Density (g / cm 3 )]]> 2.400 2.402 2.400 2.389 <![CDATA[CTE(*10 -7 (1 / ℃))]]> 70.6 76.7 75.7 75.1 Fiber elongation strain point (°C) 606 569 565 530 Fiber elongation annealing point (°C) 661 622 616 580 Fiber elongation softening point (°C) 926.4 884.5 877.9 832.5 Beam bending viscosity strain point (°C) Beam bending viscosity annealing point (°C) Beam bending viscosity softening point (°C) Liquid phase temperature (°C) - Internal 1105 1060 1080 1015 Liquid phase - primary phase spodumene spodumene spodumene spodumene Liquid phase viscosity (kP) - internal 315 301 230 338 Measure the zircon breakdown temperature (°C). 1270 Stress optical coefficient (nm / mm / MPa) 3.002 3.012 3.046 3.121 Refractive index 1.5041 1.5034 1.5030 1.5030 Poisson's ratio 0.213 E (Young's modulus, GPa) 77.8 G (shear modulus, GPa) 32.1 *Fiber ceramicization IOX Maximum CT (MPa) 88.5 80.8 82.6 81.1 For IOX K% 80 80 80 80 DOL(um) 13.9 18.9 20.0 15.5 CS(MPa) 623 627 622 610 Table 1 - Continuation

[0106] sample 5 6 7 8 <![CDATA[SiO2]]> 61.15 63.08 63.74 63.66 <![CDATA[Al2O3]]> 15.49 15.98 16.83 16.53 <![CDATA[Li2O]]> 6.87 7.06 7.46 7.38 <![CDATA[Na2O]]> 9.01 9.27 9.24 8.17 <![CDATA[K2O]]> MgO 0.22 0.22 0.22 ZnO CaO 0.33 SrO 0.20 <![CDATA[B2O3]]> 4.72 1.36 1.35 <![CDATA[P2O5]]> 2.36 2.86 2.50 2.01 <![CDATA[SnO2]]> 0.05 0.05 0.05 0.04 total 100 100 100 100 <![CDATA[Al2O3 / (R2O+RO)]]> 0.96 0.97 1.01 1.01 <![CDATA[Al2O3+Li2O]]> 22.36 23.04 24.29 23.91 <![CDATA[Na2O+Li2O+Al2O3+RO]]> 31.59 32.53 33.53 32.83 <![CDATA[Al2O3+MgO+ZnO]]> 15.71 16.20 16.83 16.75 <![CDATA[Al2O3+B2O3]]> 20.21 17.34 16.83 17.88 <![CDATA[(Al2O3+B2O3+P2O5) / (R2O+RO)]]> 1.40 1.22 1.16 1.22

[0107] Table 1 - Continuation

[0108] sample 5 6 7 8 VFT viscosity coefficient A -3.31 -3.32 -3.34 -3.24 B 8868.2 8814.9 8646.9 8372.7 To -9.5 63.0 126.2 122.8 Temperature (P) at a constant viscosity 200 1572 1631 1659 1634 35000 1120 1184 1223 1198 200000 1021 1085 1127 1103 <![CDATA[10 11 Poise temperature (°C) <![CDATA[Density (g / cm 3 )]]> 2.383 2.398 2.407 2.405 <![CDATA[CTE(*10 -7 (1 / ℃))]]> 73.9 75.5 76 70.9 Fiber elongation strain point (°C) 516 561 608 585 Fiber elongation annealing point (°C) 564 613 661 638 Fiber elongation softening point (°C) 813.7 878.0 924.0 897.8 Beam bending viscosity strain point (°C) Beam bending viscosity annealing point (°C) Beam bending viscosity softening point (°C) Liquid phase temperature (°C) - Internal 985 1050 1095 1080 Liquid phase - primary phase spodumene spodumene spodumene spodumene Liquid phase viscosity (kP) - internal 409 408 384 321 Measure the zircon breakdown temperature (°C). 1250 1260 Stress optical coefficient (nm / mm / MPa) 3.172 3.065 3.010 3.057 Refractive index 1.5023 1.5013 1.5044 1.5055 Poisson's ratio 0.211 0.218 E (Young's modulus, GPa) 77.4 77.2 G (shear modulus, GPa) 32.0 31.7 *Fiber ceramicization IOX Maximum CT (MPa) 75.4 77.2 70.0 78.0 For IOX K% 80 80 80 80 DOL(um) 13.8 19.2 CS(MPa) 591 628

[0109] Table 1 - Continuation

[0110] sample 9 10 11 12 <![CDATA[SiO2]]> 63.65 62.69 62.75 62.89 <![CDATA[Al2O3]]> 16.20 16.01 15.82 15.42 <![CDATA[Li2O]]> 7.32 6.86 6.93 6.91 <![CDATA[Na2O]]> 7.12 8.58 7.60 5.78 <![CDATA[K2O]]> MgO 0.41 0.22 0.61 ZnO CaO 0.62 0.33 0.91 SrO 0.41 0.21 0.61 <![CDATA[B2O3]]> 2.60 3.18 4.04 5.72 <![CDATA[P2O5]]> 1.52 2.45 1.97 1.01 <![CDATA[SnO2]]> 0.04 0.04 0.04 0.04 total 100 100 100 100 <![CDATA[Al2O3 / (R2O+RO)]]> 1.02 1.04 1.04 1.04 <![CDATA[Al2O3+Li2O]]> 23.52 22.87 22.75 22.34 <![CDATA[Na2O+Li2O+Al2O3+RO]]> 32.09 31.45 31.10 30.24 <![CDATA[Al2O3+MgO+ZnO]]> 16.62 16.01 16.04 16.03 <![CDATA[Al2O3+B2O3]]> 18.80 19.19 19.86 21.14 <![CDATA[(Al2O3+B2O3+P2O5) / (R2O+RO)]]> 1.28 1.40 1.43 1.49

[0111] Table 1 - Continuation

[0112] sample 9 10 11 12 VFT viscosity coefficient A -3.12 -3.66 -3.69 -3.22 B 8031.5 9526.4 9520.6 8130.5 To 129.2 20.4 15.6 99.2 Temperature (P) at a constant viscosity 200 1610 1618 1606 1573 35000 1177 1181 1173 1147 200000 1083 1083 1075 1054 <![CDATA[10 11 Poise temperature (°C) <![CDATA[Density (g / cm 3 )]]> 2.403 2.384 2.386 2.392 <![CDATA[CTE(*10 -7 (1 / ℃))]]> 66.5 72.4 68.7 60.6 Fiber elongation strain point (°C) 572 550 552 555 Fiber elongation annealing point (°C) 624 603 604 607 Fiber elongation softening point (°C) 868.9 863.3 855.4 Beam bending viscosity strain point (°C) Beam bending viscosity annealing point (°C) Beam bending viscosity softening point (°C) Liquid phase temperature (°C) - Internal 1095 1040 1050 1050 Liquid phase - primary phase spodumene spodumene spodumene spodumene Liquid phase viscosity (kP) - internal 156 480 330 216 Measure the zircon breakdown temperature (°C). Stress optical coefficient (nm / mm / MPa) 3.076 3.153 3.176 3.165 Refractive index 1.5068 1.5017 1.5034 1.5073 Poisson's ratio 0.218 0.213 0.215 0.218 E (Young's modulus, GPa) 76.8 73.8 74.3 75.7 G (shear modulus, GPa) 31.6 30.5 30.6 31.1 *Fiber ceramicization IOX Maximum CT (MPa) 94.7 71.0 73.0 90.7 For IOX K% 60 80 80 60 DOL(um) CS(MPa) Table 1 - Continuation

[0113] sample 13 14 15 16 <![CDATA[SiO2]]> 62.67 62.75 62.72 62.73 <![CDATA[Al2O3]]> 15.99 15.68 15.70 15.70 <![CDATA[Li2O]]> 6.83 6.79 6.80 6.80 <![CDATA[Na2O]]> 8.93 9.23 8.91 8.94 <![CDATA[K2O]]> MgO 0.32 ZnO 0.30 CaO SrO <![CDATA[B2O3]]> 2.89 2.91 2.90 2.89 <![CDATA[P2O5]]> 2.48 2.45 2.47 2.44 <![CDATA[SnO2]]> 0.05 0.05 0.05 0.05 total 100 100 100 100 <![CDATA[Al2O3 / (R2O+RO)]]> 1.01 0.98 0.98 0.98 <![CDATA[Al2O3+Li2O]]> 22.82 22.47 22.50 22.50 <![CDATA[Na2O+Li2O+Al2O3+RO]]> 31.75 31.70 31.73 31.74 <![CDATA[Al2O3+MgO+ZnO]]> 15.99 15.68 16.02 16.00 <![CDATA[Al2O3+B2O3]]> 18.88 18.58 18.60 18.59 <![CDATA[(Al2O3+B2O3+P2O5) / (R2O+RO)]]> 1.36 1.31 1.31 1.31

[0114] Table 1 - Continuation

[0115] sample 13 14 15 16 VFT viscosity coefficient A -3.13 -3.54 -3.60 -3.65 B 8356.9 9466.9 9566.8 9754 To 85.6 -3.7 -7.0 -28.0 Temperature (P) at a constant viscosity 200 1626 1618 1613 1611 35000 1175 1168 1167 1162 200000 1077 1067 1067 1062 <![CDATA[10 11 Poise temperature (°C) <![CDATA[Density (g / cm 3 )]]> 2.386 2.388 2.389 2.392 <![CDATA[CTE(*10 -7 (1 / ℃))]]> 73.2 75 73.5 74 Fiber elongation strain point (°C) 552 549 549 540 Fiber elongation annealing point (°C) 603 598 598 590 Fiber elongation softening point (°C) 863.6 856.7 856.1 848.6 Beam bending viscosity strain point (°C) Beam bending viscosity annealing point (°C) Beam bending viscosity softening point (°C) Liquid phase temperature (°C) - Internal 1045 1030 1020 1020 Liquid phase - primary phase spodumene spodumene spodumene spodumene Liquid phase viscosity (kP) - internal 385 417 514 453 Measure the zircon breakdown temperature (°C). Stress optical coefficient (nm / mm / MPa) 3.175 3.135 3.118 3.150 Refractive index 1.5020 1.5023 1.5026 1.5029 Poisson's ratio 0.212 0.215 0.216 0.210 E (Young's modulus, GPa) 73.7 73.7 74.1 73.8 G (shear modulus, GPa) 30.4 30.3 30.5 30.5 *Fiber ceramicization IOX Maximum CT (MPa) 67.9 69.2 72.7 63.1 For IOX K% 80 80 80 80 DOL(um) 8.5 12.2 11.4 8.4 CS(MPa) 612 596 602 600 Table 1 - Continuation

[0116] sample 17 18 19 20 <![CDATA[SiO2]]> 62.78 62.70 63.46 63.42 <![CDATA[Al2O3]]> 15.41 15.39 15.32 15.23 <![CDATA[Li2O]]> 6.79 6.84 6.43 6.63 <![CDATA[Na2O]]> 9.20 9.23 8.26 6.94 <![CDATA[K2O]]> MgO 0.32 0.41 0.60 ZnO 0.29 0.68 0.46 CaO 0.62 0.92 SrO 0.41 0.60 <![CDATA[B2O3]]> 2.87 2.89 2.79 4.09 <![CDATA[P2O5]]> 2.45 2.46 1.48 0.99 <![CDATA[SnO2]]> 0.05 0.05 0.04 0.03 total 100 100 100 100 <![CDATA[Al2O3 / (R2O+RO)]]> 0.94 0.94 0.91 0.94 <![CDATA[Al2O3+Li2O]]> 22.20 22.23 21.75 21.86 <![CDATA[Na2O+Li2O+Al2O3+RO]]> 31.72 31.75 32.13 31.37 <![CDATA[Al2O3+MgO+ZnO]]> 15.73 15.68 16.42 16.28 <![CDATA[Al2O3+B2O3]]> 18.28 18.28 18.11 19.32 <![CDATA[(Al2O3+B2O3+P2O5) / (R2O+RO)]]> 1.27 1.27 1.17 1.26

[0117] Table 1 - Continuation

[0118] sample 17 18 19 20 VFT viscosity coefficient A -4.02 -2.78 -4.02 -2.78 B 10772.8 7764.8 10772.8 7764.8 To -98.8 94.6 -98.8 94.6 Temperature (P) at a constant viscosity 200 1606 1622 1606 1622 35000 1160 1154 1160 1154 200000 1057 1055 1057 1055 <![CDATA[10 11 Poise temperature (°C) <![CDATA[Density (g / cm 3 )]]> 2.391 2.395 2.391 2.395 <![CDATA[CTE(*10 -7 (1 / ℃))]]> 75 74.6 75 74.6 Fiber elongation strain point (°C) 538 538 538 538 Fiber elongation annealing point (°C) 586 586 586 586 Fiber elongation softening point (°C) 843.3 841.2 843.3 841.2 Beam bending viscosity strain point (°C) Beam bending viscosity annealing point (°C) Beam bending viscosity softening point (°C) Liquid phase temperature (°C) - Internal 1015 1015 1015 1015 Liquid phase - primary phase spodumene spodumene spodumene spodumene Liquid phase viscosity (kP) - internal 452 449 452 449 Measure the zircon breakdown temperature (°C). Stress optical coefficient (nm / mm / MPa) 3.127 3.137 3.127 3.137 Refractive index 1.5026 1.5028 1.5026 1.5028 Poisson's ratio 0.217 0.214 0.217 0.214 E (Young's modulus, GPa) 74.1 73.9 74.1 73.9 G (shear modulus, GPa) 30.5 30.4 30.5 30.4 *Fiber ceramicization IOX Maximum CT (MPa) 66.7 70.1 66.7 70.1 For IOX K% 80 80 80 80 DOL(um) 8.5 11.9 8.5 11.9 CS(MPa) 601 580 601 580 Table 1 - Continuation

[0119] sample 21 22 23 24 <![CDATA[SiO2]]> 63.50 63.56 65.31 64.75 <![CDATA[Al2O3]]> 15.12 15.03 15.36 15.34 <![CDATA[Li2O]]> 6.69 6.46 7.14 7.19 <![CDATA[Na2O]]> 5.63 6.22 8.07 8.09 <![CDATA[K2O]]> MgO 0.79 0.59 0.23 0.23 ZnO 0.23 0.46 CaO 1.22 0.93 0.36 0.36 SrO 0.81 0.60 0.21 0.21 <![CDATA[B2O3]]> 5.40 5.05 1.20 1.20 <![CDATA[P2O5]]> 0.51 0.99 1.99 2.48 <![CDATA[SnO2]]> 0.03 0.04 0.04 0.04 total 100 100 100 100 <![CDATA[Al2O3 / (R2O+RO)]]> 0.98 0.99 0.96 0.95 <![CDATA[Al2O3+Li2O]]> 21.81 21.48 22.50 22.53 <![CDATA[Na2O+Li2O+Al2O3+RO]]> 30.48 30.28 31.36 31.42 <![CDATA[Al2O3+MgO+ZnO]]> 16.13 16.07 15.59 15.57 <![CDATA[Al2O3+B2O3]]> 20.52 20.07 16.56 16.54 <![CDATA[(Al2O3+B2O3+P2O5) / (R2O+RO)]]> 1.37 1.38 1.16 1.18

[0120] Table 1 - Continuation

[0121] sample 21 22 23 24 VFT viscosity coefficient A -3.27 -3.08 -3.43 -3.65 B 8264.6 7920.8 9196.3 9772.5 To 76.4 100.2 53.5 11.1 Temperature (P) at a constant viscosity 200 1560 1573 1658 1654 35000 1134 1140 1207 1204 200000 1041 1046 1107 1103 <![CDATA[10 11 Poise temperature (°C) <![CDATA[Density (g / cm 3 )]]> 2.407 2.402 2.400 2.398 <![CDATA[CTE(*10 -7 (1 / ℃))]]> 60.2 61.1 70.8 71.3 Fiber elongation strain point (°C) 550 549 575 575 Fiber elongation annealing point (°C) 599 598 629 628 Fiber elongation softening point (°C) 840.0 844.6 895.6 893.5 Beam bending viscosity strain point (°C) Beam bending viscosity annealing point (°C) Beam bending viscosity softening point (°C) Liquid phase temperature (°C) - Internal 1055 1045 1085 1080 Liquid phase - primary phase spodumene spodumene spodumene spodumene Liquid phase viscosity (kP) - internal 150 203 307 313 Measure the zircon breakdown temperature (°C). Stress optical coefficient (nm / mm / MPa) 3.177 3.199 3.054 3.063 Refractive index 1.5101 1.5080 1.5040 1.5036 Poisson's ratio 0.218 0.221 0.210 0.210 E (Young's modulus, GPa) 75.9 75.5 76.4 76.0 G (shear modulus, GPa) 31.1 30.9 31.6 31.4 *Fiber ceramicization IOX Maximum CT (MPa) 75.8 71.4 For IOX K% 80 80 DOL(um) 14.3 15 CS(MPa) 641 625

[0122] Table 1 - Continuation

[0123] sample 25 26 27 28 <![CDATA[SiO2]]> 64.27 65.34 64.78 64.33 <![CDATA[Al2O3]]> 15.35 15.37 15.35 15.35 <![CDATA[Li2O]]> 7.16 7.12 7.18 7.14 <![CDATA[Na2O]]> 8.13 7.68 7.72 7.74 <![CDATA[K2O]]> MgO 0.23 0.24 0.23 0.23 ZnO CaO 0.36 0.36 0.36 0.36 SrO 0.21 0.21 0.21 0.21 <![CDATA[B2O3]]> 1.19 1.20 1.20 1.18 <![CDATA[P2O5]]> 2.97 1.99 2.48 2.97 <![CDATA[SnO2]]> 0.04 0.04 0.04 0.04 total 100 100 100 100 <![CDATA[Al2O3 / (R2O+RO)]]> 0.95 0.98 0.98 0.98 <![CDATA[Al2O3+Li2O]]> 22.51 22.49 22.53 22.49 <![CDATA[Na2O+Li2O+Al2O3+RO]]> 31.44 30.98 31.05 31.03 <![CDATA[Al2O3+MgO+ZnO]]> 15.58 15.61 15.58 15.58 <![CDATA[Al2O3+B2O3]]> 16.53 16.57 16.55 16.53 <![CDATA[(Al2O3+B2O3+P2O5) / (R2O+RO)]]> 1.21 1.19 1.21 1.24

[0124] Table 1 - Continuation

[0125] sample 25 26 27 28 VFT viscosity coefficient A -3.55 -3.39 -3.92 -3.60 B 9513.8 9158.6 10489.9 9622.5 To 22.0 55.1 -33.9 19.7 Temperature (P) at a constant viscosity 200 1647 1664 1652 1651 35000 1197 1209 1205 1202 200000 1097 1109 1104 1101 <![CDATA[10 11 Poise temperature (°C) <![CDATA[Density (g / cm 3 )]]> 2.397 2.399 2.396 2.395 <![CDATA[CTE(*10 -7 (1 / ℃))]]> 70.4 71.1 71.5 71.5 Fiber elongation strain point (°C) 566 578 569 563 Fiber elongation annealing point (°C) 618 631 621 616 Fiber elongation softening point (°C) 883.9 897.6 890.2 883.0 Beam bending viscosity strain point (°C) Beam bending viscosity annealing point (°C) Beam bending viscosity softening point (°C) Liquid phase temperature (°C) - Internal 1060 1080 1080 1070 Liquid phase - primary phase spodumene spodumene spodumene spodumene Liquid phase viscosity (kP) - internal 411 349 314 367 Measure the zircon breakdown temperature (°C). Stress optical coefficient (nm / mm / MPa) 3.066 3.053 3.045 3.056 Refractive index 1.5028 1.5039 1.5032 1.5023 Poisson's ratio 0.213 0.208 0.208 0.211 E (Young's modulus, GPa) 75.7 76.3 75.7 75.4 G (shear modulus, GPa) 31.2 31.6 31.3 31.1 *Fiber ceramicization IOX Maximum CT (MPa) 71.5 77.7 72.4 68.7 For IOX K% 80 80 80 80 DOL(um) 10.8 15.1 15.8 17.2 CS(MPa) 631 634 625 610

[0126] Table 1 - Continuation

[0127] sample 29 30 31 32 <![CDATA[SiO2]]> 65.67 65.72 61.76 61.88 <![CDATA[Al2O3]]> 14.96 14.98 16.76 16.46 <![CDATA[Li2O]]> 8.44 8.09 7.20 6.67 <![CDATA[Na2O]]> 7.10 7.41 9.79 9.92 <![CDATA[K2O]]> MgO 1.93 1.42 ZnO CaO SrO <![CDATA[B2O3]]> 1.22 1.20 0.50 3.54 <![CDATA[P2O5]]> 2.47 2.47 1.94 0.00 <![CDATA[SnO2]]> 0.03 0.03 0.03 0.03 total 100 100 100 100 <![CDATA[Al2O3 / (R2O+RO)]]> 0.96 0.97 0.89 0.91 <![CDATA[Al2O3+Li2O]]> 23.41 23.07 23.96 23.13 <![CDATA[Na2O+Li2O+Al2O3+RO]]> 30.51 30.48 35.68 34.47 <![CDATA[Al2O3+MgO+ZnO]]> 14.96 14.98 18.69 17.88 <![CDATA[Al2O3+B2O3]]> 16.18 16.18 17.26 20.00 <![CDATA[(Al2O3+B2O3+P2O5) / (R2O+RO)]]> 1.20 1.20 1.01 1.11

[0128] Table 1 - Continuation

[0129] sample 29 30 31 32 VFT viscosity coefficient A -3.11 -3.62 -3.44 -3.83 B 8482.5 9733.5 8733.9 9765 To 93.8 10.5 78 -29.5 Temperature (P) at a constant viscosity 200 1661 1656 1600 1564 35000 1202 1203 1172 1137 200000 1102 1102 1078 1040 <![CDATA[10 11 Poise temperature (°C) <![CDATA[Density (g / cm 3 )]]> <![CDATA[CTE(*10 -7 (1 / ℃))]]> Fiber elongation strain point (°C) 586 541 Fiber elongation annealing point (°C) 636 590 Fiber elongation softening point (°C) 880.5 834.5 Beam bending viscosity strain point (°C) Beam bending viscosity annealing point (°C) Beam bending viscosity softening point (°C) Liquid phase temperature (°C) - Internal 1120 1110 1050 1025 Liquid phase - primary phase spodumene spodumene spodumene spodumene Liquid phase viscosity (kP) - internal 143 173 354 271 Measure the zircon breakdown temperature (°C). Stress optical coefficient (nm / mm / MPa) Refractive index Poisson's ratio E (Young's modulus, GPa) G (shear modulus, GPa) *Fiber ceramicization IOX Maximum CT (MPa) 85 80 For IOX K% 80 80 DOL(um) 14.24 10.72 CS(MPa) 680 720

[0130] Table 1 - Continuation

[0131] sample 33 34 35 36 <![CDATA[SiO2]]> 67.79 66.81 66.25 65.77 <![CDATA[Al2O3]]> 14.75 14.40 14.77 15.18 <![CDATA[Li2O]]> 6.25 7.79 7.83 7.82 <![CDATA[Na2O]]> 8.80 3.06 4.25 5.41 <![CDATA[K2O]]> MgO 2.29 ZnO CaO SrO <![CDATA[B2O3]]> 0.00 4.11 3.37 2.57 <![CDATA[P2O5]]> 0.00 3.64 3.34 3.05 <![CDATA[SnO2]]> 0.03 0.05 0.04 0.04 total 100 100 100 100 <![CDATA[Al2O3 / (R2O+RO)]]> 0.85 1.33 1.22 1.15 <![CDATA[Al2O3+Li2O]]> 21.00 22.19 22.60 22.99 <![CDATA[Na2O+Li2O+Al2O3+RO]]> 32.09 25.25 26.85 28.41 <![CDATA[Al2O3+MgO+ZnO]]> 17.04 14.40 14.77 15.18 <![CDATA[Al2O3+B2O3]]> 14.75 18.51 18.14 17.75 <![CDATA[(Al2O3+B2O3+P2O5) / (R2O+RO)]]> 0.85 2.04 1.78 1.57

[0132] Table 1 - Continuation

[0133] sample 33 34 35 36 VFT viscosity coefficient A -3.59 -3.52 -3.29 -3.46 B 9618 9361.4 8722.1 9190.6 To 38.1 64.6 110.1 67.8 Temperature (P) at a constant viscosity 200 1672 1673 1671 1662 35000 1221 1226 1224 1215 200000 1120 1126 1126 1116 <![CDATA[10 11 Poise temperature (°C) <![CDATA[Density (g / cm 3 )]]> <![CDATA[CTE(*10 -7 (1 / ℃))]]> Fiber elongation strain point (°C) 598 Fiber elongation annealing point (°C) 650 Fiber elongation softening point (°C) Beam bending viscosity strain point (°C) Beam bending viscosity annealing point (°C) Beam bending viscosity softening point (°C) Liquid phase temperature (°C) - Internal 1075 1135 1130 1125 Liquid phase - primary phase spodumene spodumene spodumene spodumene Liquid phase viscosity (kP) - internal 489 169 184 170 Measure the zircon breakdown temperature (°C). Stress optical coefficient (nm / mm / MPa) Refractive index Poisson's ratio E (Young's modulus, GPa) G (shear modulus, GPa) *Fiber ceramicization IOX Maximum CT (MPa) 80 For IOX K% 80 DOL(um) 9.76 CS(MPa) 662

[0134] Table 1 - Continuation

[0135] sample 37 38 39 40 <![CDATA[SiO2]]> 65.27 64.62 64.28 62.46 <![CDATA[Al2O3]]> 15.58 15.94 14.98 15.98 <![CDATA[Li2O]]> 7.85 7.85 7.86 7.85 <![CDATA[Na2O]]> 6.58 7.92 4.82 4.82 <![CDATA[K2O]]> MgO ZnO CaO SrO <![CDATA[B2O3]]> 1.77 0.99 4.90 4.78 <![CDATA[P2O5]]> 2.75 2.47 2.96 3.93 <![CDATA[SnO2]]> 0.04 0.04 0.05 0.04 total 100 100 100 100 <![CDATA[Al2O3 / (R2O+RO)]]> 1.08 1.01 1.18 1.26 <![CDATA[Al2O3+Li2O]]> 23.43 23.79 22.84 23.82 <![CDATA[Na2O+Li2O+Al2O3+RO]]> 30.01 31.71 27.66 28.64 <![CDATA[Al2O3+MgO+ZnO]]> 15.58 15.94 14.98 15.98 <![CDATA[Al2O3+B2O3]]> 17.35 16.93 19.88 20.76 <![CDATA[(Al2O3+B2O3+P2O5) / (R2O+RO)]]> 1.39 1.23 1.80 1.95

[0136] Table 1 - Continuation

[0137] sample 37 38 39 40 VFT viscosity coefficient A -3.20 -3.27 -3.73 -3.42 B 8563.4 8725.8 9716.3 8763.3 To 112.5 97 4.2 67.3 Temperature (P) at a constant viscosity 200 1669 1664 1616 1600 35000 1218 1214 1179 1168 200000 1120 1115 1080 1073 <![CDATA[10 11 Poise temperature (°C) <![CDATA[Density (g / cm 3 )]]> <![CDATA[CTE(*10 -7 (1 / ℃))]]> Fiber elongation strain point (°C) Fiber elongation annealing point (°C) Fiber elongation softening point (°C) Beam bending viscosity strain point (°C) Beam bending viscosity annealing point (°C) Beam bending viscosity softening point (°C) Liquid phase temperature (°C) - Internal 1125 1105 1080 1110 Liquid phase - primary phase spodumene spodumene spodumene spodumene Liquid phase viscosity (kP) - internal 181 245 202 98 Measure the zircon breakdown temperature (°C). Stress optical coefficient (nm / mm / MPa) Refractive index Poisson's ratio E (Young's modulus, GPa) G (shear modulus, GPa) *Fiber ceramicization IOX Maximum CT (MPa) For IOX K% DOL(um) CS(MPa)

[0138] Table 1 - Continuation

[0139] sample 41 42 43 44 <![CDATA[SiO2]]> 60.47 63.41 64.52 63.18 <![CDATA[Al2O3]]> 16.92 14.97 15.22 15.65 <![CDATA[Li2O]]> 7.86 7.85 8.46 7.61 <![CDATA[Na2O]]> 4.81 4.78 3.65 4.75 <![CDATA[K2O]]> MgO ZnO CaO SrO <![CDATA[B2O3]]> 4.87 4.91 3.45 3.32 <![CDATA[P2O5]]> 4.88 3.89 4.51 5.30 <![CDATA[SnO2]]> 0.04 0.04 0.04 0.04 total 100 100 100 100 <![CDATA[Al2O3 / (R2O+RO)]]> 1.34 1.19 1.26 1.27 <![CDATA[Al2O3+Li2O]]> 24.78 22.81 23.68 23.26 <![CDATA[Na2O+Li2O+Al2O3+RO]]> 29.59 27.59 27.33 28.01 <![CDATA[Al2O3+MgO+ZnO]]> 16.92 14.97 15.22 15.65 <![CDATA[Al2O3+B2O3]]> 21.79 19.88 18.67 18.96 <![CDATA[(Al2O3+B2O3+P2O5) / (R2O+RO)]]> 2.11 1.88 1.91 1.96

[0140] Table 1 - Continuation

[0141] sample 41 42 43 44 VFT viscosity coefficient A -3.20 -3.68 -3.29 -3.31 B 8138.4 9752.6 8715.6 8803.5 To 112.6 -5.6 93.8 83 Temperature (P) at a constant viscosity 200 1591 1624 1652 1651 35000 1163 1180 1206 1203 200000 1070 1080 1108 1105 <![CDATA[10 11 Poise temperature (°C) <![CDATA[Density (g / cm 3 )]]> <![CDATA[CTE(*10 -7 (1 / ℃))]]> Fiber elongation strain point (°C) Fiber elongation annealing point (°C) Fiber elongation softening point (°C) Beam bending viscosity strain point (°C) Beam bending viscosity annealing point (°C) Beam bending viscosity softening point (°C) Liquid phase temperature (°C) - Internal 1065 1065 1120 1070 Liquid phase - primary phase spodumene spodumene spodumene spodumene Liquid phase viscosity (kP) - internal 220 266 159 404 Measure the zircon breakdown temperature (°C). Stress optical coefficient (nm / mm / MPa) Refractive index Poisson's ratio E (Young's modulus, GPa) G (shear modulus, GPa) *Fiber ceramicization IOX Maximum CT (MPa) For IOX K% DOL(um) CS(MPa)

[0142] Table 1 - Continuation

[0143] sample 45 46 47 <![CDATA[SiO2]]> 63.64 63.66 63.61 <![CDATA[Al2O3]]> 15.39 16.19 16.22 <![CDATA[Li2O]]> 8.10 8.07 7.99 <![CDATA[Na2O]]> 7.30 8.11 8.20 <![CDATA[K2O]]> 0.52 0.52 MgO 0.33 0.32 ZnO CaO SrO <![CDATA[B2O3]]> 1.95 0.38 0.39 <![CDATA[P2O5]]> 3.58 2.67 2.67 <![CDATA[SnO2]]> 0.05 0.05 0.05 total 100 100 100 <![CDATA[Al2O3 / (R2O+RO)]]> 1.00 0.95 0.95 <![CDATA[Al2O3+Li2O]]> 23.49 24.26 24.21 <![CDATA[Na2O+Li2O+Al2O3+RO]]> 30.79 32.70 32.73 <![CDATA[Al2O3+MgO+ZnO]]> 15.39 16.53 16.55 <![CDATA[Al2O3+B2O3]]> 17.34 16.58 16.62 <![CDATA[(Al2O3+B2O3+P2O5) / (R2O+RO)]]> 1.36 1.13 1.13

[0144] Table 1 - Continuation

[0145] sample 45 46 47 VFT viscosity coefficient A -3.74 -2.91 -3.53 B 10098.8 7803.3 9361 To -29.6 146.2 28.1 Temperature (P) at a constant viscosity 200 1642.37 1643.95 1634.58 35000 1189.61 1193.19 1188.07 200000 1087.52 1096.66 1088.59 <![CDATA[10 11 Poise temperature (°C) <![CDATA[Density (g / cm 3 )]]> 2.370 <![CDATA[CTE(*10 -7 (1 / ℃))]]> 70.7 Fiber elongation strain point (°C) 543 Fiber elongation annealing point (°C) 597 Fiber elongation softening point (°C) 867.9 Beam bending viscosity strain point (°C) Beam bending viscosity annealing point (°C) Beam bending viscosity softening point (°C) Liquid phase temperature (°C) - Internal 1070 1100 1115 Liquid phase - primary phase Liquid phase viscosity (kP) - internal 279 187 122 Measure the zircon breakdown temperature (°C). Stress optical coefficient (nm / mm / MPa) Refractive index Poisson's ratio E (Young's modulus, GPa) G (shear modulus, GPa) *Fiber ceramicization IOX Maximum CT (MPa) 72 For IOX K% 70 DOL(um) 10 CS(MPa) 570

[0146] Unless otherwise stated, all components, relationships, and proportions described in this specification are provided in mol%. All scopes disclosed in this specification include any and all scopes and subscopes covered by the broadly disclosed scope, whether or not explicitly stated before or after the disclosure.

[0147] It will be apparent to those skilled in the art that various modifications and variations can be made to the embodiments described herein without departing from the spirit and scope of the claimed subject matter. Therefore, this specification is intended to cover modifications and variations to the various embodiments described herein, provided that such modifications and variations fall within the scope of the appended claims and their equivalents.

[0148] As used in this article, trailing zeros in a number are intended to indicate the number of significant digits. For example, the number "1.0" has two significant digits, while the number "1.00" has three significant digits.

Claims

1. A glass composition comprising: 55.0 mol% to 70.0 mol% of SiO2; Al₂O₃ with a content greater than or equal to 12.0 mol% to less than or equal to 20.0 mol%; B2O3 concentration greater than 3.0 mol% to less than or equal to 5.5 mol%; Li₂O with a concentration greater than or equal to 5.0 mol% to less than or equal to 15.0 mol%; Greater than or equal to 4.0 mol% to less than or equal to 15.0 mol% of Na₂O, P₂O₅ concentrations greater than or equal to 0.5 mol% and less than or equal to 3.0 mol%, and MgO content greater than or equal to 0.2 mol% and less than or equal to 2.0 mol%. in: -8.00mol%≤R2O+RO–Al2O3–B2O3–P2O5≤-1.75mol%, 9.10≤(SiO2+Al2O3+Li2O) / Na2O, 1.80≤(Li2O+Al2O3+P2O5) / (Na2O+B2O3)≤2.80, Al₂O₃ + Li₂O > 23 mol%. The concentration of Al₂O₃ + Li₂O + Na₂O is greater than or equal to 31.37 mol%, and RO is the sum of divalent cations selected from the group consisting of MgO, CaO, SrO, BaO, FeO, and ZnO, while R2O is the sum of alkali metal oxides selected from the group consisting of Li2O, Na2O, K2O, Rb2O, Cs2O, and Fr2O.

2. A glass composition comprising: 55.0 mol% to 70.0 mol% of SiO2; Al₂O₃ with a content greater than or equal to 12.0 mol% to less than or equal to 20.0 mol%; B2O3 concentration greater than 3.0 mol% to less than or equal to 5.5 mol%; Li₂O with a concentration greater than or equal to 5.0 mol% to less than or equal to 15.0 mol%; Greater than or equal to 4.0 mol% to less than or equal to 15.0 mol% of Na₂O, P₂O₅ concentrations greater than or equal to 0.5 mol% and less than or equal to 3.0 mol%, and MgO content greater than or equal to 0.2 mol% and less than or equal to 2.0 mol%. in: -8.00mol%≤R2O+RO–Al2O3–B2O3–P2O5≤-1.75mol%, 9.10≤(SiO2+Al2O3+Li2O) / Na2O, 1.80≤(Li2O+Al2O3+P2O5) / (Na2O+B2O3)≤2.80, Al₂O₃ + Li₂O > 24.5 mol%. The concentration of Al₂O₃ + Li₂O + Na₂O is greater than or equal to 33.53 mol%, and RO is the sum of divalent cations selected from the group consisting of MgO, CaO, SrO, BaO, FeO, and ZnO, while R2O is the sum of alkali metal oxides selected from the group consisting of Li2O, Na2O, K2O, Rb2O, Cs2O, and Fr2O.

3. A glass composition comprising: SiO2 of ≥ 55.0 mol% to ≤ 70.0 mol%; Al2O3 of ≥ 12.0 mol% to ≤ 20.0 mol%; B2O3 of > 0 mol% to ≤ 7.5 mol%; Li2O of ≥ 5.0 mol% to ≤ 15.0 mol%; Na2O of ≥ 4.0 mol% to ≤ 15.0 mol%, and P2O5 of ≥ 4.0 mol% to ≤ 5.0 mol%, wherein: -8.00 mol% ≤ R2O + RO – Al2O3 – B2O3 – P2O5 ≤ -1.75 mol%, [[ID= ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 8. The glass composition according to any one of claims 1-4, wherein 1.80≤(Li2O+Al2O3+P2O5) / (Na2O+B2O3)≤2.

40.

9. The glass composition according to any one of claims 1-4, wherein 2.00≤(Li2O+Al2O3+P2O5) / (Na2O+B2O3)≤2.

80.

10. The glass composition according to any one of claims 1-4, wherein the B2O3+P2O5 content is greater than 4.0 mol%.

11. The glass composition according to any one of claims 1-4, wherein 1.00≤(Li2O+Al2O3) / (Na2O+B2O3+P2O5)≤2.

75.

12. The glass composition according to any one of claims 1-4, wherein 0.90 <Al2O3 / (R2O+RO)<1.20。 13. The glass composition according to any one of claims 1-4, wherein 1.0<(Al2O3+B2O3+P2O5) / (R2O+RO).

14. The glass composition according to any one of claims 1-4, wherein 6.96Al2O3–1.90B2O3+2.16CaO+3.30MgO–1.50Na2O+12.74Li2O–1.10SrO–14.50K2O–1.87La2O3+6.13ZrO2–76.40mol%>50.00mol%.

15. A glass article comprising: First surface; A second surface opposite to the first surface, wherein the thickness (t) of the glass article is expressed as the distance between the first surface and the second surface; and A compressive stress layer extends from at least one of the first surface and the second surface to the thickness (t) of the glass article, wherein The center tension of the glass product is greater than or equal to 60 MPa. The compression depth of the compressive stress layer is greater than or equal to 0.15t and less than or equal to 0.25t, and The glass article is formed from the glass composition according to any one of claims 1-4.

16. The glass article of claim 15, wherein the center tension of the glass article is greater than or equal to 80 MPa.

17. The glass article of claim 15, wherein the center tension of the glass article is greater than or equal to 90 MPa.

18. The glass article of claim 15, wherein the compression depth of the compressive stress layer is greater than or equal to 0.18t and less than or equal to 0.22t.

19. The glass article of claim 15, wherein the liquid phase viscosity of the glass article is greater than or equal to 20 kP and less than 1000 kP.

20. A consumer electronics product, comprising: A housing, the housing including a front surface, a rear surface and side surfaces; Electrical components located at least partially within the housing, including at least a controller, a memory, and a display, the display being located at or near the front surface of the housing; and Cover substrate disposed above the display At least a portion of at least one of the housing and the cover substrate comprises the glass article of claim 15.

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