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Method for inhibiting stress relaxation of chemically strengthened glass

A technology for strengthening glass and stress relaxation, which is applied in the field of inhibiting stress relaxation of chemically strengthened glass, can solve problems such as inapplicability, and achieve the effects of increased service life, simple process, and improved aging resistance

Active Publication Date: 2018-04-24
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But for silicate glass, the above method is obviously not applicable

Method used

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  • Method for inhibiting stress relaxation of chemically strengthened glass
  • Method for inhibiting stress relaxation of chemically strengthened glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The method for suppressing stress relaxation of chemically strengthened glass comprises the following steps:

[0028] (1) Preheat the chemically strengthened glass in a high temperature furnace. The preheating temperature is 85°C, and the preheating time is 20 minutes;

[0029] (2) Put the preheated chemically strengthened glass into a low-temperature furnace to cool quickly. Cooling temperature -70°C, cooling time 25min;

[0030] (3) Take out the cooled glass and let it stand at room temperature for 120min;

[0031] (4) After standing still at room temperature, put the chemically strengthened glass into a high-temperature furnace for preheating. The preheating temperature is 85°C, and the preheating time is 3 minutes;

[0032] (5) Quickly put the preheated chemically strengthened glass into a low-temperature furnace to cool. Cooling temperature -70°C, cooling time 7min;

[0033] (6) Repeat steps (4) and (5), the number of repetitions is 10 times;

[0034] (7) Af...

Embodiment 2

[0039] The method for suppressing stress relaxation of chemically strengthened glass comprises the following steps:

[0040] (1) Preheat the chemically strengthened glass in a high temperature furnace. The preheating temperature is 100°C, and the preheating time is 25 minutes;

[0041] (2) Put the preheated chemically strengthened glass into a low-temperature furnace to cool quickly. Cooling temperature -50°C, cooling time 30min;

[0042] (3) Take out the cooled glass and let it stand at room temperature for 120min;

[0043] (4) After standing still at room temperature, put the chemically strengthened glass into a high-temperature furnace for preheating. The preheating temperature is 100°C, and the preheating time is 5 minutes;

[0044] (5) Quickly put the preheated chemically strengthened glass into a low-temperature furnace to cool. Cooling temperature -50°C, cooling time 7min;

[0045] (6) Repeat steps (4) and (5), the number of repetitions is 15 times;

[0046] (7) ...

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PUM

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Abstract

The invention relates to a method for inhibiting stress relaxation of glass, in particular to a method for inhibiting stress relaxation of chemically strengthened glass. Stress relaxation of the chemically strengthened glass at high temperature can be inhibited only by alternately placing the chemically strengthened glass under high-temperature and low-temperature conditions for a certain time. Generally speaking, surface stress can be lowered by about 20% when the chemically strengthened glass is treated for 2 hours at 300 DEG C; surface stress is only lowered by about 5% after being treatedby the method, so that the service life of the chemically strengthened glass is prolonged greatly. The method is simple in process and suitable for industrial production. The aging resistance of the chemically strengthened glass treated by the method is improved greatly.

Description

technical field [0001] The present invention relates to a method for suppressing stress relaxation of glass, more specifically, to a method for suppressing stress relaxation of chemically strengthened glass. Background technique [0002] Chemical strengthening is to immerse the glass in a molten salt containing alkali ions with a radius larger than that of the alkali metal ions in the glass, through ion exchange, and then use the difference in radius between the two alkali metal ions to cause a "crowding" effect on the surface to form a surface pressure. Stress layer, so as to achieve the effect of increasing strength [A.K.Varshneya, Fundamentals of Inorganic Glasses, Academic Press, New York, 1994, pp.339.]. At present, due to the advantage of strengthening ultra-thin glass and complex-shaped glass, chemical strengthening has been widely used in many fields [S.Karlsson, B.Jonson, The technology of chemical glass strengthening-a review, Glass Technol: Eur.J. GlassSci.Techno...

Claims

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Application Information

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IPC IPC(8): C03B32/00
CPCC03B32/00
Inventor 姜良宝颜悦李晓宇李佳明厉蕾
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS