Glass, integrated glass and glass product

Abstract

The present invention relates to the field of glass preparation, specifically to a glass, an integrated glass and a glass product. The present invention provides a glass, comprising: 58wt% to 72wt% SiO2; 5wt% to 14wt% Al2O3; 3.5wt% to 6.5wt% CaO; 2wt% to 6wt% MgO; 12wt% to 19wt% Na2O; and 4.05wt% to 8wt% K2O. The glass provided by the present invention can achieve the characteristics of low softening point and easy strengthening through the effective combination of various oxides and the synergistic effect between them. It is easy to heat form and has high strength and low preparation cost. Experiments show that the softening point of the glass provided by the present invention is much lower than that of the glass of the comparative example. Its softening point is basically less than 760°C, and the lowest reaches 708°C. At the same time, the strengthening performance data shows that the glass provided by the present invention has the characteristics of high strength.

Description

Technical Field

[0001] The invention relates to the field of glass preparation, in particular to glass, integrated glass and glass products. Background Art

[0002] With the increasing popularity of new energy vehicles and the improvement of their intelligence and personalization, curved display technology is being used in more and more places in the car. At present, large-size curved display glass for vehicles mostly adopts hot pressing technology. The hot pressing temperature needs to be close to the softening point of the glass, which is as high as 900°C, resulting in high consumption of hot pressing molds and optical defects on the glass surface, which ultimately affects the yield and unit cost.

[0003] On the other hand, with the increasing requirements for lightweight new energy vehicles and consumers' increasing requirements for automobile quality, more and more automobile manufacturers have begun to replace one layer of laminated glass with medium-high aluminum-alkali aluminum-silicate ultra-thin glass. However, since the softening point temperature of the common medium-high aluminum-alkali aluminum-silicate ultra-thin glass on the market is higher than the softening point of the currently used sodium-lime glass, the large number of hot bending equipment invested by automobile dealers cannot reach the softening point required for the hot bending of medium-high aluminum-alkali aluminum-silicate ultra-thin glass.

[0004] At the same time, the current medium-high aluminum alkali aluminum-silicate ultra-thin glass is insufficiently strong, resulting in the need for chemical strengthening treatment of automotive curved display glass and laminated glass to increase strength, increasing costs. Summary of the invention

[0005] In view of this, the technical problem to be solved by the present invention is to provide a glass, an integrated glass and a glass product. The glass provided by the present invention has a low softening point, is easy to heat-form, has high strength and low preparation cost.

[0006] The present invention provides a glass comprising:

[0007] 58 wt%~72 wt% SiO2;

[0008] 5 wt%~14 wt% Al2O3;

[0009] 3.5 wt%~6.5 wt% CaO;

[0010] 2 wt%~6 wt% MgO;

[0011] 12 wt%~19 wt% Na2O;

[0012] and 4.05 wt%~8 wt% K2O.

[0013] In certain embodiments of the present invention, the glass preferably comprises:

[0014] 60 wt%~69 wt% SiO2;

[0015] 5 wt%~13 wt% Al2O3;

[0016] 3.5 wt%~6.5 wt% CaO;

[0017] 2 wt%~6 wt% MgO;

[0018] 13 wt%~16 wt% Na2O;

[0019] and 4.05 wt%~6 wt% K2O.

[0020] CaO has the effect of reducing the viscosity of glass. Too high a content is not conducive to ion exchange, and too low a content is not conducive to maintaining a low production cost. K2O has the effect of fluxing and reducing the softening point of glass. Too high a content will reduce the chemical stability of the glass, and too low a content is not conducive to ion exchange. A certain content of CaO and K2O is suitable for using mineral raw materials as glass raw materials, which can significantly reduce the cost of glass raw materials and melting energy consumption. In certain embodiments of the present invention, the mass sum of the CaO and the K2O in the above-mentioned glass is 9.05 wt%~12 wt%; the mass ratio of the CaO and the K2O is 0.6~1.55. In one embodiment, the total mass of the CaO and the K2O in the above-mentioned glass is 10.37 wt%; the mass ratio of the CaO and the K2O is 6.22:4.15. In one embodiment, the total mass of the CaO and the K2O in the above-mentioned glass is 10.02 wt%; the mass ratio of the CaO and the K2O is 5.95:4.07. In one embodiment, the total mass of the CaO and the K2O in the glass is 10.25 wt %; the mass ratio of the CaO to the K2O is 5.93:4.32.

[0021] MgO is beneficial for reducing glass viscosity and improving glass strengthening performance. In certain embodiments of the present invention, the total mass of the CaO and the MgO in the glass is 4 wt% to 10 wt%; the mass ratio of the CaO to the MgO is less than 1.9.

[0022] Na2O has a fluxing effect and can reduce the melting temperature of the glass. Too high a content reduces the chemical stability, while too low a content makes melting more difficult. It is also an essential ion for ion exchange, and a sufficient content can maintain excellent strengthening performance. In certain embodiments of the present invention, the total mass of the K2O and the Na2O in the above-mentioned glass is 17 wt%~22wt%; the ratio of the mass of the K2O to the total mass of the Na2O and K2O is 0.05~0.35.

[0023] In certain embodiments of the present invention, the ratio of the mass of the Al2O3 in the glass to the total mass of the Na2O and K2O is 0.3-0.8.

[0024] In certain embodiments of the present invention, the total mass of the SiO2 and the Al2O3 in the above-mentioned glass is 70 wt%~78 wt%.

[0025] In one embodiment, the glass provided by the present invention preferably includes: 66.00 wt% SiO2; 6.00 wt% Al2O3; 6.22 wt% CaO; 3.78 wt% MgO; 13.85 wt% Na2O; and 4.15 wt% K2O;

[0026] In one embodiment, the glass provided by the present invention preferably includes: 65.00 wt% SiO2; 7.00 wt% Al2O3; 5.95 wt% CaO; 4.05 wt% MgO; 13.93 wt% Na2O; and 4.07 wt% K2O;

[0027] In one embodiment, the glass provided by the present invention preferably includes: 66.00 wt% SiO2; 6.48 wt% Al2O3; 5.93 wt% CaO; 3.57 wt% MgO; 13.70 wt% Na2O; and 4.32 wt% K2O.

[0028] The present invention also provides a method for preparing the above-mentioned glass, comprising the following steps: casting the molten liquid of the above-mentioned glass composition into a mold, annealing, and obtaining the above-mentioned glass. Specifically, the batch material of the above-mentioned glass composition is heated to obtain a molten liquid of the above-mentioned glass composition; the molten liquid is cast into a mold in a mold, annealed, and cooled to obtain the above-mentioned glass. In one embodiment, the heating temperature is 1550°C to 1650°C, preferably 1600°C; the heating time is 3 h to 6 h, preferably 4 h. In one embodiment, the annealing temperature is 530°C to 620°C, and the annealing time is 580°C.

[0029] The present invention also provides an integrated glass obtained by subjecting the above glass to chemical strengthening treatment.

[0030] The present invention also provides a glass product obtained by processing the above-mentioned integrated glass.

[0031] The present invention provides a glass, comprising: 58 wt% to 72 wt% of SiO2; 5 wt% to 14 wt% of Al2O3; 3.5 wt% to 6.5 wt% of CaO; 2 wt% to 6 wt% of MgO; 12 wt% to 19 wt% of Na2O; and 4.05 wt% to 8 wt% of K2O. The glass provided by the present invention can achieve the characteristics of low softening point and easy strengthening through the effective combination of various oxides and the synergistic effect between them. It is easy to heat form and has high strength and low preparation cost. Experiments show that the softening point of the glass provided by the present invention is much lower than that of the glass of the comparative example. Its softening point is basically less than 760°C, and the lowest reaches 708°C. At the same time, referring to the strengthening performance data, it can be seen that the glass provided by the present invention has the characteristics of high strength. DETAILED DESCRIPTION

[0032] The present invention discloses a glass, an integrated glass and a glass product. A person skilled in the art can refer to the content of this article and appropriately improve the process parameters to achieve the same. It should be particularly noted that all similar substitutions and modifications are obvious to a person skilled in the art and are considered to be included in the present invention. The method and application of the present invention have been described through preferred embodiments, and relevant personnel can obviously modify or appropriately change and combine the method and application of this article without departing from the content, spirit and scope of the present invention to implement and apply the technology of the present invention.

[0033] The preparation method of the glass of the present invention is as follows:

[0034] The raw materials were weighed in a certain proportion to prepare the batch material, which was melted in a platinum-rhodium crucible at 1600°C for 4 hours, poured into a mold, and kept at 580°C in an annealing furnace for 1 hour. The mixture was cooled to 450°C at a rate of 1°C / min, and then naturally cooled to room temperature. Finally, the softening point and strengthening properties were tested by sample preparation.

[0035] The present invention will be further described below in conjunction with embodiments:

[0036] Embodiments 1 to 15

[0037] The present invention prepares the glasses of Examples 1 to 15 according to the above preparation method and the glass compositions shown in Table 1. The units of the glass compositions shown in Table 1 are mass percentages:

[0038] Table 1

[0039] Example <![CDATA[SiO2]]> <![CDATA[Al2O3]]> CaO MgO <![CDATA[Na2O]]> <![CDATA[K2O]]> <![CDATA[SiO2+ Al2O3]]> CaO+MgO CaO / MgO <![CDATA[Na2O+K2O]]> <![CDATA[K2O / R2O]]> <![CDATA[Al2O3 / R2O]]> 1 63.50 7.00 5.82 4.08 13.10 6.00 70.50 9.90 1.43 19.10 0.31 0.37 2 61.50 11.82 4.38 2.91 13.39 6.00 73.32 7.29 1.51 19.39 0.31 0.61 3 66.00 6.00 6.22 3.78 13.85 4.15 72.00 10.00 1.65 18.00 0.23 0.33 4 65.00 7.00 5.95 4.05 13.93 4.07 72.00 10.00 1.47 18.00 0.23 0.39 5 64.00 8.00 5.95 4.05 13.35 4.65 72.00 10.00 1.47 18.00 0.26 0.44 6 63.00 9.00 5.96 4.04 12.77 5.23 72.00 10.00 1.48 18.00 0.29 0.50 7 62.00 10.00 5.97 4.03 12.19 5.81 72.00 10.00 1.48 18.00 0.32 0.56 8 61.00 11.00 6.19 3.81 13.25 4.75 72.00 10.00 1.62 18.00 0.26 0.61 9 60.00 12.00 6.22 3.78 12.82 5.18 72.00 10.00 1.65 18.00 0.29 0.67 10 62.00 11.82 3.79 2.50 13.89 6.00 73.82 6.29 1.52 19.89 0.30 0.59 11 61.00 11.82 3.79 2.50 14.89 6.00 72.82 6.29 1.52 20.89 0.29 0.57 12 66.00 6.48 5.93 3.57 13.70 4.32 72.48 9.50 1.66 18.02 0.24 0.36 13 61.00 12.00 3.87 2.13 15.82 5.18 73.00 6.00 1.82 21.00 0.25 0.57 14 60.00 13.00 3.87 2.13 15.82 5.18 73.00 6.00 1.82 21.00 0.25 0.62 15 59.00 14.00 3.87 2.13 15.82 5.18 73.00 6.00 1.82 21.00 0.25 0.67

[0040] Note: R2O refers to K2O and Na2O.

[0041] Comparative Examples 1 to 3

[0042] The present invention prepares the glasses of Comparative Examples 1 to 3 according to the above preparation method and the glass compositions shown in Table 2. The amount units of the glass compositions shown in Table 2 are mass percentages:

[0043] Table 2

[0044] Comparative Example 1 2 3 <![CDATA[SiO2]]> 66.00 66.00 61.00 <![CDATA[Al2O3]]> 8.00 11.00 14.00 <![CDATA[SiO2+ Al2O3]]> 74.00 77.00 75.00 CaO 6.50 5.19 4.87 MgO 5.00 2.81 2.13 CaO+MgO 11.50 8.00 7.00 CaO / MgO 1.30 1.85 2.29 <![CDATA[Na2O]]> 13.50 13.00 15.00 <![CDATA[K2O]]> 1.00 2.00 3.00 <![CDATA[Na2O+K2O]]> 14.50 15.00 18.00 <![CDATA[K2O / R2O]]> 0.07 0.13 0.17 <![CDATA[Al2O3 / R2O]]> 0.55 0.73 0.78

[0045] Note: R2O refers to K2O and Na2O.

[0046] Example 16

[0047] The glasses of Examples 1 to 15 and Comparative Examples 1 to 3 prepared above were tested for strengthening performance and softening point, wherein the strengthening performance includes CS (surface compressive stress), DoL (stress layer thickness) and CT (body center tensile stress) tests, all of which were tested using Japan Orihara FSM6000LE; the softening point was tested in accordance with the national standard "GB / T 28195-2011 Glass Softening Point Test Method", and the test results are shown in Table 3:

[0048] Table 3

[0049]

[0050] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A glass, characterized in that: It is composed of the following components: 63.5 wt%~69 wt% SiO2; 5 wt%~7 wt% Al2O3; 5.93 wt%~6.5 wt% CaO; 2 wt%~6 wt% MgO; 13 wt%~16 wt% Na2O; and 4.05 wt%~6 wt% K2O; The mass sum of the CaO and the K2O is 9.98 wt% to 12 wt%; the mass ratio of the CaO to the K2O is 0.6 to 1.55; The total mass of the CaO and the MgO is 7.93 wt% to 10 wt%; the mass ratio of the CaO to the MgO is less than 1.9; The ratio of the mass of the K2O to the total mass of the Na2O and K2O is 0.05-0.35; The ratio of the mass of the Al2O3 to the total mass of the Na2O and K2O is 0.3-0.

8.

2. The glass according to claim 1, characterized in that The total mass of the CaO and the K2O is 10.37 wt %; the mass ratio of the CaO to the K2O is 6.22:4.15; or, The total mass of the CaO and the K2O is 10.02 wt %; the mass ratio of the CaO to the K2O is 5.95:4.07; or, The total mass of the CaO and the K2O is 10.25 wt %; the mass ratio of the CaO to the K2O is 5.93:4.

32.

3. The glass according to claim 1, characterized in that It is composed of the following components: 66.00 wt% SiO2; 6.00 wt% Al2O3; 6.22 wt% CaO; 3.78 wt% MgO; 13.85 wt% Na2O; and 4.15 wt% K2O; or, 65.00 wt% SiO2; 7.00 wt% Al2O3; 5.95 wt% CaO; 4.05 wt% MgO; 13.93 wt% Na2O; and 4.07 wt% K2O; or, 66.00 wt% SiO2; 6.48 wt% Al2O3; 5.93 wt% CaO; 3.57 wt% MgO; 13.70 wt% Na2O; and 4.32 wt% K2O.

4. An integrated glass, characterized in that: The glass according to any one of claims 1 to 3 is obtained by subjecting the glass to chemical strengthening treatment.

5. A glass product, characterized in that: The integrated glass according to claim 4 is obtained by processing.

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