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A method of 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 improving service life, simple process and improved aging resistance.

Active Publication Date: 2020-10-20
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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  • A method of inhibiting stress relaxation of chemically strengthened glass
  • A method of inhibiting stress relaxation of chemically strengthened glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0028] (1) Put the chemically strengthened glass into a high-temperature furnace to preheat. Preheating temperature 85℃, preheating time 20min;

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

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

[0031] (4) After standing at room temperature, put the chemically strengthened glass into a high-temperature furnace to preheat. Preheating temperature 85℃, preheating time 3min;

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

[0033] (6) Repeat steps (4) and (5) for 10 times;

[0034] (7) After the cycle operation is over, take out the glass and let it stand at room ...

Embodiment 2

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

[0040] (1) Put the chemically strengthened glass into a high-temperature furnace to preheat. The preheating temperature is 100℃, and the preheating time is 25min;

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

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

[0043] (4) After standing at room temperature, put the chemically strengthened glass into a high-temperature furnace to preheat. The preheating temperature is 100℃, and the preheating time is 5min;

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

[0045] (6) Repeat steps (4) and (5) for 15 times;

[0046] (7) After the cycle operation is over, take o...

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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 inhibiting stress relaxation of glass, and more specifically, to a method for inhibiting 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 larger radius than the alkali metal ions in the glass, through ion exchange, and then use the difference in the radii of the two alkali metal ions to create a "crowding" effect on the surface to form surface pressure. Stress layer, so as to achieve the effect of improving strength [AK Varshneya, Fundamentals of Inorganic Glasses, Academic Press, New York, 1994, pp. 339.]. At present, chemical strengthening has the advantage of being able to strengthen ultra-thin glass and complex-shaped glass, and has a wide range of applications in many fields [S.Karlsson, B. Jonson, Thetechnology of chemical glass strengthening-a review, Glass Technol: Eur. GlassSci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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