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Tempering process for reducing self-explosion rate of glass

A glass, self-explosion technology, applied in the field of glass tempering, can solve the problems of small ion exchange depth, long tempering time, uneven ion diffusion speed, etc.

Active Publication Date: 2021-06-08
ANHUI SCI & TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the rapid development of the tempered glass industry, there are still various technical problems in the glass tempering process that have not been solved: the tempering time is long, the long-term high-temperature tempering makes the energy consumption too high, and the high ion exchange temperature leads to molten salt heat. Decomposition will reduce the mechanical strength of tempered glass and reduce the ion exchange temperature, which will lead to incomplete ion exchange and inability to achieve complete tempering, low ion exchange capacity and small ion exchange depth; uneven ion diffusion speed will cause micro cracks on the glass surface High self-explosion rate during the process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A tempering process for reducing the self-explosion rate of glass is characterized in that, it is carried out according to the following steps:

[0024] (1) Cut the original glass sheet into a glass sheet with a thickness of 1mm and a size of 60mm×35 mm, then polish and polish the upper and lower surfaces of the glass sheet, and clean it ultrasonically with deionized water. The original glass sheet is soda-lime silicate Glass, in which the mass proportion of each main component is SiO 2 : 72.5%, Na 2 O: 15%, CaO: 9%;

[0025] (2) Add KMnO with a concentration of 0.1mol / L to the glass slide after ultrasonic cleaning 4 solution, seal and heat to 70°C, keep warm for 3 hours, then filter out the glass sheet and wash it with high-purity water;

[0026] (3) In KMnO 4 Add K at a concentration of 2 mol / L to the hydrothermally treated glass flakes 2 Cr 2 o 7 solution, seal and heat to 120°C, keep warm for 3 hours, then filter out the glass piece and wash it with high-puri...

Embodiment 2

[0031] A tempering process for reducing the self-explosion rate of glass is characterized in that, it is carried out according to the following steps:

[0032](1) Cut the original glass sheet into a glass sheet with a thickness of 1mm and a size of 60mm×35 mm, then polish and polish the upper and lower surfaces of the glass sheet, and clean it ultrasonically with deionized water. The original glass sheet is soda-lime silicate Glass, in which the mass proportion of each main component is SiO 2 : 72.5%, Na 2 O: 15%, CaO: 9%;

[0033] (2) Add KMnO with a concentration of 1mol / L to the glass slide after ultrasonic cleaning 4 solution, seal and heat to 100°C, keep warm for 2 hours, then filter out the glass piece and wash it with high-purity water;

[0034] (3) In KMnO 4 Add K at a concentration of 4 mol / L to the hydrothermally treated glass flakes 2 Cr 2 o 7 solution, seal and heat to 140°C, keep warm for 2 hours, then filter out the glass piece and wash it with high-purity...

Embodiment 3

[0039] A tempering process for reducing the self-explosion rate of glass is characterized in that, it is carried out according to the following steps:

[0040] (1) Cut the original glass sheet into a glass sheet with a thickness of 1mm and a size of 60mm×35 mm, then polish and polish the upper and lower surfaces of the glass sheet, and clean it ultrasonically with deionized water. The original glass sheet is soda-lime silicate Glass, in which the mass proportion of each main component is SiO 2 : 72.5%, Na 2 O: 15%, CaO: 9%;

[0041] (2) Add KMnO with a concentration of 0.5mol / L to the glass slide after ultrasonic cleaning 4 solution, seal and heat to 80°C, keep warm for 2.5h, then filter out the glass piece and wash it with high-purity water;

[0042] (3) In KMnO 4 Add K at a concentration of 3 mol / L to the hydrothermally treated glass flakes 2 Cr 2 o 7 solution, seal and heat to 130°C, keep warm for 2.5h, then filter out the glass piece and wash it with high-purity wat...

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Abstract

The invention relates to a tempering process for reducing the spontaneous explosion rate of glass, and the process is characterized in that the process comprises the following steps: pretreating a glass sheet, sequentially carrying out hydro-thermal treatment in a KMnO4 solution and a K2Cr2O7 solution, then carrying out microwave heating treatment in a potassium hydroxide aqueous solution with the mass concentration of 0.2-0.4%, preheating the treated glass sheet at the high temperature of 420-450 DEG C for 20-30 minutes, putting the glass sheet in potassium nitrate fused salt, carrying out ion exchange at the temperature of 350-390 DEG C for 1-4 hours; performing cooling to 200-230 DEG C at the speed of 1-2 DEG C / min, and then performing cooling along with the furnace. According to the invention, glass tempering is completed at a low temperature in a short time, so that the tempering efficiency is greatly improved, and meanwhile, the energy consumption is reduced; in addition, the self-destruction rate of the tempered glass is as low as 0.04%, the Na+ exchange capacity reaches 82.4-85.6%, and the ion exchange depth reaches 139-155 [mu]m; and the bending strength reaches 607-641 MPa.

Description

technical field [0001] The invention relates to the technical field of glass tempering, in particular to a tempering process for reducing the self-explosion rate of glass. Background technique [0002] Glass is a transparent solid material widely used in the design of living room or building, in industry, military, energy production, ecological environment, modern communication technology, etc. The main component of soda lime silicate glass is Na 2 O CaO 6SiO 2 , the main component of borosilicate glass is Na 2 O.B 2 o 3 and SiO 2 , the main component is silicon dioxide. In order to improve the strength of glass, ordinary glass is usually tempered to improve its performance and expand its application range. Tempered glass is a kind of prestressed glass, which is to form compressive stress on the surface of ordinary glass through physical or chemical methods. When the glass is subjected to external force, it first offsets the surface stress, thereby improving the bearin...

Claims

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Application Information

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IPC IPC(8): C03C21/00
CPCC03C21/002
Inventor 周永生徐少春靳盼汪徐春高玉静张雪梅周化光
Owner ANHUI SCI & TECH UNIV
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