Mother glass, tempered glass and preparation method

A technology for strengthening glass and plain glass, applied in the field of glass production, can solve the problems of uneven distribution of the strength of the compressive stress layer of the strengthened glass, unable to improve the overall strength of the glass, etc., and achieve the effect of high refractive index

Active Publication Date: 2018-06-12
CHONGQING XINJING SPECIAL GLASS CO LTD
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  • Abstract
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Problems solved by technology

This will inevitably lead to uneven strength distribution of the compressive stress layer of the final strengthened glass.
[0004] In short, so far, whether it is physical toughening or chemical strengthening, whether it is one-time strengthening or multiple strengthening, the stress distribution or the concentration of the exchanged ions in the single-layer compressive stress layer formed on the glass surface is along the The inward direction of the glass surface decreases sharply, so the compressive stress layer does not change much in the depth direction, so the overall strength of the glass cannot be improved

Method used

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  • Mother glass, tempered glass and preparation method
  • Mother glass, tempered glass and preparation method
  • Mother glass, tempered glass and preparation method

Examples

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preparation example Construction

[0061] The present invention provides a kind of preparation method of strengthened layer glass, comprises the following steps:

[0062] Plain glass is provided, the plain glass is preheated in an environment lower than the annealing point temperature of the glass, and then the preheated plain glass is contained in at least two salts of Na ions, K ions, Ru ions and Cs ions The ion exchange treatment is carried out once and only once in the bath liquid, and the plain glass is prepared into strengthened glass with a composite compressive stress layer formed on the surface in one step.

[0063] In the above preparation process, the thickness of the plain glass ranges from 0.4mm to 2.0mm, the transmittance of light with a wavelength of 550nm to the plain glass ranges from 86% to 92.2%, and the refractive index of the plain glass ranges from 1.48 ~1.54, the mol content of alkali metal oxides in the plain glass is 8mol%~22mol%, wherein, the mol content of Na oxides is 2.65mol%~18mol%...

Embodiment 3-7

[0189] The applicant has also carried out additional experiment to the plain glass adopted in embodiment 3-5, and its difference with embodiment 3-5 is: change the salt bath of ion exchange for the first time into 100% NaNO 3 , the process conditions are set to 420 degrees Celsius, 270 minutes; change the second ion exchange salt bath to 100% KNO 3 , and the process conditions were set at 390 degrees Celsius for 120 minutes.

[0190] It is detected that the depth of compressive stress of the strengthened glass obtained in Example 3-7 is 300 μm, and the maximum compressive stress value is 800 Mpa. In addition, the strength of each thickness extending from the surface to the inside of the strengthened glass obtained in Example 3-7 is also detected. The compressive stress value can thus draw the compressive stress curve inside the strengthened glass obtained in embodiment 3-7, and the second fitting curve is obtained after the compressive stress curve is adopted by Orihara Pmc so...

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Abstract

The invention discloses mother glass. Thickness of the mother glass is 0.4-2.0mm, transmittance range of light of 550nm in wavelength to the mother glass is 86-92.2%, refraction coefficient range of the mother glass is 1.48-1.54, alkaline metal oxide content in the mother glass is 11-22mol%, oxide content of Na is 5-18mol%, and oxide content of Al is 7-16mol%. Aiming at the technical problem thatmechanical performance of existing tempered glass needs to be improved, content proportion of components in the mother glass is designed reasonably to enable the components to give play to synergism and cooperate with each other, so that the mother glass has the advantages of high refraction coefficient, high 550nm-wavelength transmittance and good chemical strengthening effect, and study and application of chemically strengthened glass are well pushed. The invention further discloses tempered glass prepared from the mother glass and a preparation method of the tempered glass.

Description

technical field [0001] The invention relates to the technical field of glass production, in particular to plain glass, strengthened glass and a preparation method. Background technique [0002] Chemically strengthened glass is currently used in mobile phones, media players, and other terminals due to its high transparency, high strength, and abrasion resistance. The high strength of chemically strengthened glass is achieved through ion exchange. The principle is: the smaller ions in the glass can be replaced with the larger ions in the salt bath at high temperature. Strong compressive stress, thus showing higher strength. [0003] However, in the ion exchange process, the salt bath will dilute the larger ions with the increase of the smaller ions being exchanged, and continuing to use the same salt bath will reduce the compressive stress of the glass; in addition, the shallow surface of the glass is larger. The ion concentration is too concentrated, and the enriched large ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C4/00C03C3/085C03C3/087C03C3/097C03C21/00
CPCC03C3/085C03C3/087C03C3/097C03C4/0092C03C21/002C03C4/18C03C21/005C03C2204/00
Inventor 胡伟谈宝权陈芳华
Owner CHONGQING XINJING SPECIAL GLASS CO LTD
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