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A method for preparing mechanically sensitive glass by isothermal two-step ion exchange

A technology of ion exchange and mechanics, which is applied in the field of material engineering, can solve the problems of high requirements for molten salt "freshness", insufficient glass compressive stress, insufficient stress thickness, etc., achieve good performance, avoid the influence of glass strength, Good fracture concentration effect

Inactive Publication Date: 2017-09-26
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above-mentioned patent application, the operation process used is complicated. The thin glass needs to go through two preheating and cooling, three washing and drying processes. The operation time is long, and the "freshness" of the molten salt is high, and the obtained glass has compressive stress. Insufficient, insufficient stress thickness, etc.

Method used

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  • A method for preparing mechanically sensitive glass by isothermal two-step ion exchange
  • A method for preparing mechanically sensitive glass by isothermal two-step ion exchange
  • A method for preparing mechanically sensitive glass by isothermal two-step ion exchange

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Its components and properties of the selected soda-lime-silica glass in the present embodiment are as shown in Table 1:

[0038] Table 1

[0039]

[0040] This example provides an ion exchange medium for preparing mechanically sensitive glass, which can be used as the first step of preparing mechanically sensitive glass to temper molten salt for ion exchange, and the contents of its components are shown in Table 2.

[0041] Table 2

[0042] molten salt components

potassium nitrate

Potassium hydroxide

potassium carbonate

Potassium tetrafluoroborate

diatomite

clay

Ceria

total

purity

≥99.8％

≥99％

≥99.8％

≥99.8％

≥99％

≥99％

≥99.8

quality score

96％

0.6％

1.5％

0.2％

1％

0.5％

0.2％

100％

[0043] This embodiment also provides an ion exchange medium for preparing mechanically sensitive glass, which can be used as the second step of tempering molten salt for preparing mechanic...

Embodiment 2

[0055] Its components and properties of the selected sodium aluminum silicate glass in the present embodiment are as shown in Table 4:

[0056] Table 4

[0057]

[0058] This example provides an ion exchange medium for preparing mechanically sensitive glass, which can be used as the first step of preparing mechanically sensitive glass for ion exchange by tempering molten salt, and the contents of its components are shown in Table 5.

[0059] table 5

[0060] molten salt components

potassium nitrate

Potassium hydroxide

potassium carbonate

Potassium tetrafluoroborate

diatomite

clay

Ceria

total

purity

≥99.8％

≥99％

≥99.8％

≥99.8％

≥99％

≥99％

≥99.8

quality score

95.7％

1％

1％

0.1％

1％

1％

0.2％

100％

[0061] This embodiment also provides an ion exchange medium for preparing mechanically sensitive glass, which can be used as the second step of tempering molten salt for preparing m...

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Abstract

The invention provides a method for preparing mechanically sensitive glass by isothermal two-step ion exchange. The ion exchange medium is used as a toughened molten salt for the preparation of mechanically sensitive glass for ion exchange. It is mainly composed of potassium nitrate or potassium nitrate and sodium nitrate, and potassium hydroxide, potassium carbonate, potassium tetrafluoroborate, and diatomaceous earth are added. , clay, cerium oxide. The method for preparing mechanically sensitive glass by two-step ion exchange is: put the glass sheet in the first step of tempered molten salt for ion exchange, the time of ion exchange is 24-28h, and the temperature is T1; then place it in the second step of tempered molten salt Carry out ion exchange, the time of ion exchange is 15-60min, the temperature is T2, T1=T2. The two-step ion-exchange mechanically sensitive glass prepared by the invention has good performances. While obtaining the required strength, it has good fracture concentration, and the glass has the characteristic of multiple cracks as a fracture warning.

Description

technical field [0001] The invention belongs to the technical field of material engineering, and in particular relates to a method for preparing mechanically sensitive glass by isothermal two-step ion exchange and an ion exchange medium for preparing mechanically sensitive glass. Background technique [0002] Silicate glass has many excellent physical properties, such as high strength, high light transmittance and high hardness. Therefore, silicate glass and its products are widely used in various fields of national economy. However, with the promotion of applications and the development of industries, the requirements for the strength and thermal shock resistance of silicate glass are increasing day by day. However, the brittleness of the glass material itself limits its application. The biggest factor affecting the strength of glass is the micro-cracks in the glass. Under stress, the brittle nature of the glass prevents the micro-cracks from pinning the micro-cracks or r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B27/03
CPCY02P40/57
Inventor 何峰李玉辉谢峻林刘小青
Owner WUHAN UNIV OF TECH
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