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Dual-phase ion exchange method for glass enhancement

An ion exchange method and ion exchange technology, applied in the field of glass-reinforced two-stage ion exchange method, can solve the problems of multiple procedures, complex operation process, high energy consumption, etc., achieve simple process, increase surface stress and stress layer depth Effect

Inactive Publication Date: 2014-07-02
CHINA LUOYANG FLOAT GLASS GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] At the same time, in the above-mentioned patent application, the operation process used by the inventor is very complicated. Not only do two kinds of molten salts with different compositions and temperatures are required, but also the thin glass needs to go through two preheating, two cooling and cleaning processes. In the actual production process There are too many processes, the energy consumption is large, and it is not conducive to the improvement of the pass rate

Method used

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  • Dual-phase ion exchange method for glass enhancement

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Experimental program
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Effect test

Embodiment 1

[0022] The material of the glass substrate is ordinary soda-lime-silica glass, and the process includes washing, preheating, chemical tempering, cooling and other processes of the original glass sheet; 10 minutes, rinse with pure water and dry for later use, then place the clean original glass piece on the rack, put it together with the rack into the preheating furnace for preheating, the temperature rise rate of the preheating furnace is 5°C per minute , when it rises to 300°C, keep it warm for 30 minutes, then put the glass into the molten salt for ion exchange, the temperature of the molten salt is 450°C, and the ion exchange time is 4 hours; the molten salt is potassium nitrate molten salt, no other additive.

[0023] After the ion exchange in this step, take out 5 pieces of glass with glass numbers 1-5 and quickly put them into the annealing furnace to cool down. Take out the glass from the furnace door, wash the molten salt attached to the glass surface and dry it.

[...

Embodiment 2

[0028] The difference between this embodiment and Embodiment 1 is that the original glass sheet is made of alkali aluminosilicate glass with a thickness of 0.7 mm and an aluminum content of about 14% (mass percentage).

[0029] The test results are as follows:

[0030]

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Abstract

The invention belongs to the technical field of glass reinforced treatment and proposes a dual-phase ion exchange method for glass enhancement. According to the proposed dual-phase ion exchange method for glass enhancement, in an area lower than the glass transition temperature, two stages of ion exchange processes are carried out in the same fused salt at two different temperatures; the ion exchange temperature of the first stage is higher than that of the second stage; the ion exchange time of the first stage is greater than that of the second stage; the glass with a deep enough stress layer is obtained after the first stage of ion exchange in the fused salt; the glass with the deep enough stress layer is subjected to the second-stage ion exchange inside the same fused salt, so as to obtain the glass with large enough surface stress and the deep enough stress layer. By adopting the dual-phase ion exchange method for glass enhancement, the surface stress and the stress layer depth of thin glass are greatly improved, and the dual-phase ion exchange method has a simple process.

Description

technical field [0001] The invention belongs to the technical field of glass strengthening treatment, and proposes a two-stage ion exchange method for glass strengthening. Background technique [0002] Chemical tempered glass, also known as ion exchange strengthened glass, is based on the principle of changing the composition of the glass surface according to the diffusion mechanism of ions, that is, alkali metal ions (A + ) by different alkali metal ions with larger radii in the molten salt (B + ) to generate a compressive stress layer on the surface of the glass, thereby achieving the purpose of improving the strength of the glass. According to the type of exchanged ions and the temperature of ion exchange, ion exchange can be divided into high temperature type (higher than glass transition point temperature) and low temperature type (lower than glass transition point temperature) two ion exchange methods. The present invention relates to a low temperature type ion excha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C21/00
Inventor 陈志红王艳霞郭利波司敏杰郭丽华李廷李晓青沈洁秦岩
Owner CHINA LUOYANG FLOAT GLASS GROUP
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