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Method for removing surface compressive stress of toughened glass through chemical ion exchange

A technology for surface compressive stress and strengthened glass, which is applied in the field of removing the surface compressive stress of strengthened glass, which can solve the problems that the surface of strengthened glass cannot be scratched, achieve high flatness, avoid product bending, and improve the effect of utilization

Inactive Publication Date: 2017-05-03
LENS TECH
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for eliminating the compressive stress on the surface of strengthened glass by chemical ion exchange, so as to solve the technical problem that the surface of strengthened glass cannot be scratched due to the existence of stress or stress difference.

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  • Method for removing surface compressive stress of toughened glass through chemical ion exchange
  • Method for removing surface compressive stress of toughened glass through chemical ion exchange
  • Method for removing surface compressive stress of toughened glass through chemical ion exchange

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Embodiment Construction

[0021] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in various ways defined and covered by the claims.

[0022] see figure 1 , the present invention removes the glass surface compressive stress (CS) by chemical ion exchange, and the steps are as follows: the strengthened glass is first preheated, and then transferred to a glass equipped with NaNO 3 High-temperature ion exchange is carried out in the mixed solution of the glass, so that K in the glass + with Na in solution + Substitution is carried out to make the smaller ionic radius Na in the solution + Replaces K with larger ionic radius in glass + , in order to achieve the purpose of removing the compressive stress on the glass surface, the reaction principle formula is as follows:

[0023] K + 玻 +Na + 液 →Na + 玻 +K + 液

[0024] The specific implementation is as follows:

[0025] The first ste...

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Abstract

The invention provides a method for removing surface compressive stress of toughened glass through chemical ion exchange. The toughened glass is put into a mixed solution of potassium nitrate and sodium nitrate after preheating. K+ with a large ionic radius in the glass is replaced with Na+ with a small ionic radius in the solution through an ion exchange method. The concentration of the Na+ in the solution is maintained in 140000 ppm or above. According to the method for removing the surface compressive stress of the toughened glass through the chemical ion exchange, firstly, surface compressive stress removing is conducted on the toughened glass with the sand blasting effect, and then follow-up process treatment is conducted, so that product bending caused by the stress difference of the toughened glass can be avoided, the using rate of products is increased, and the high-flatness and high-quality toughened glass smooth surface is obtained.

Description

technical field [0001] The invention relates to the technical field of strengthened glass panel processing, in particular to a process for removing compressive stress on the surface of strengthened glass by chemical ion exchange. Background technique [0002] Glass lenses have gradually replaced acrylic lenses and are widely used because of their good light transmission, excellent touch and feel. Tempered glass (Tempered glass / Reinforced glass) is a kind of prestressed glass. In the preparation process, in order to improve the strength of tempered glass, chemical or physical methods are usually used to form a compressive stress layer on the glass surface, so that when the glass is subjected to external forces, the surface stress is first offset, thereby improving the overall bearing capacity of the glass and strengthening the glass itself. Wind pressure resistance, cold and heat resistance, impact resistance and other physical properties. The impact strength of tempered gl...

Claims

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Application Information

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IPC IPC(8): C03C21/00
Inventor 周群飞饶桥兵阮利顺
Owner LENS TECH
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