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Chemical enhancement method of high-alkalinity aluminum silicate glass with controllable surface stress

A silicate glass, surface stress technology, applied in the field of glass deep processing, can solve the problems of reducing the internal tensile stress of the glass, making the glass not easy to self-explosion, etc., achieving the effects of no environmental pollution, not easy to self-explosion, scratch resistance and increased toughness

Inactive Publication Date: 2017-03-08
BEIJING HANGBO NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a novel method for chemical strengthening of high alkali aluminosilicate glass with controllable surface stress. The technical problem to be solved is to control the surface stress of high alkali aluminosilicate glass so that the chemical strengthening The final high alkali aluminosilicate glass has a deep stress layer under relatively low surface stress conditions, which reduces the internal tensile stress of the glass and makes the glass less prone to self-explosion, making it more suitable for practical use.

Method used

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  • Chemical enhancement method of high-alkalinity aluminum silicate glass with controllable surface stress

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] According to 75wt% KNO 3 and 25wt% NaNO 3 Proportional configuration of molten salt 10kg, put into the salt tank, melt and clarify in the muffle furnace for 24 hours. Clamp the processed glass sample with a clamp, preheat it in a high-temperature furnace for 15 minutes, and then immerse it in a molten salt bath for ion exchange. The exchange time is set to 12h, and the exchange temperature is 420°C. After the exchange, the fixture was taken out from the molten salt, and after cooling down to room temperature, the glass sample was cleaned with deionized water and wiped clean for testing.

[0033] Test the chemically strengthened glass sample: the surface and edge of the glass are of good quality without deformation; the FSM-6000LE automatic surface stress meter of Suzhou Jingchuang Optical Instrument Co., Ltd. is used to test the chemically strengthened glass sample, and the surface stress The size is 385MPa, and the stress layer depth is 60μm.

Embodiment 2

[0038] According to 85wt% KNO 3 and 15wt% NaNO 3 Proportional configuration of molten salt 10kg, put into the salt tank, melt and clarify in the muffle furnace for 24 hours. Clamp the processed glass sample with a clamp, preheat it in a high-temperature furnace for 15 minutes, and then immerse it in a molten salt bath for ion exchange. The exchange time is set to 12h, and the exchange temperature is 420°C. After the exchange, the fixture was taken out from the molten salt, and after cooling down to room temperature, the glass sample was cleaned with deionized water and wiped clean for testing.

[0039] Test the chemically strengthened glass sample: the surface and edge of the glass are of good quality without deformation; the FSM-6000LE automatic surface stress meter of Suzhou Jingchuang Optical Instrument Co., Ltd. is used to test the chemically strengthened glass sample, and the surface stress The size is 462MPa, and the stress layer depth is 59μm.

Embodiment 3

[0041] According to 95wt% KNO 3 and 5wt% NaNO 3 Proportional configuration of molten salt 10kg, put into the salt tank, melt and clarify in the muffle furnace for 24 hours. Clamp the processed glass sample with a clamp, preheat it in a high-temperature furnace for 15 minutes, and then immerse it in a molten salt bath for ion exchange. The exchange time is set to 12h, and the exchange temperature is 420°C. After the exchange, the fixture was taken out from the molten salt, and after cooling down to room temperature, the glass sample was cleaned with deionized water and wiped clean for testing.

[0042] Test the chemically strengthened glass sample: the surface and edge of the glass are of good quality without deformation; the FSM-6000LE automatic surface stress meter of Suzhou Jingchuang Optical Instrument Co., Ltd. is used to test the chemically strengthened glass sample, and the surface stress The size is 585MPa, and the stress layer depth is 62μm.

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Abstract

The invention relates to a chemical enhancement method of high-alkalinity aluminum silicate glass with controllable surface stress. The method comprises steps of 1) mixing potassium nitrate and sodium nitrate, melting, and clarifying to obtain molten salt; 2) preheating a high-alkalinity aluminum silicate glass sample, immersing in the molten salt, carrying out high-temperature molten salt ion exchange, removing and cooling, and washing and drying to obtain chemically enhanced high-alkalinity aluminum silicate glass. The chemical enhancement method of controllable surface stress high-alkalinity aluminum silicate glass according to the invention is simple to perform, is free of noise and environmental pollution and is suitable for industrial batch production; surface stress can be controlled by adjusting the composition of molten salt, surface stress depth can be controlled by adjusting ion exchange temperature and time, and the high-alkalinity aluminum silicate glass is imparted a deep stress layer under relatively low surface stress, has decreased inner tensile stress, is rarely self-destructed, and has improved scratch resistance and toughness.

Description

technical field [0001] The invention relates to the field of glass deep processing, in particular to a chemical strengthening method of high alkali aluminosilicate glass with controllable surface stress. Background technique [0002] High-alkali aluminosilicate glass is a new type of high-strength glass that contains high amounts of aluminum and alkali and is suitable for chemical strengthening. Due to the high content of Al 2 o 3 , it has excellent mechanical properties, especially in terms of hardness, toughness and scratch resistance, and has high transmittance in the visible light band. Therefore, this kind of glass is the preferred protective cover material for display products with touch and handwriting functions. It can effectively improve the display effect and prolong the service life of the product. With the maturity of high-alkali aluminosilicate glass production technology, its application fields are also expanding, in addition to being used as a traditional t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C21/00
CPCC03C21/002
Inventor 徐驰张保军李要辉陈记寿臧曙光左岩
Owner BEIJING HANGBO NEW MATERIAL TECH
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