High borosilicate fireproof tempered glass and tempering method thereof

A technology of tempered glass and high borosilicate, applied in chemical instruments and methods, cleaning methods and utensils, cleaning methods using liquids, etc. Performance, the effect of excellent tempering strength

Active Publication Date: 2021-06-11
ANHUI SCI & TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High borosilicate glass usually adopts physical tempering method, such as patent application CN112225438A, CN111547998A, this is because when high borosilicate glass is chemically tempered, due to its less alkali metal ion content and small thermal expansion coefficient, in the ion exchange process, the ion exchange Low volume, shallow exchange depth, high self-explosion rate, and potential safety hazards

Method used

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  • High borosilicate fireproof tempered glass and tempering method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A tempering method of high borosilicate fireproof tempered glass, carried out according to the following steps:

[0028] (1) Cut the original high borosilicate 4.0 glass sheet into a glass sheet with a thickness of 1mm and a size of 60mm×35mm, then polish and polish the upper and lower surfaces of the glass sheet, and ultrasonically clean it with deionized water;

[0029](2) Add K at a concentration of 0.1mol / L to the glass slide after ultrasonic cleaning 2 Cr 2 o 7 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;

[0030] (3) in K 2 Cr 2 o 7 Add KMnO with a concentration of 2mol / L to the hydrothermally treated glass flakes 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;

[0031] (4) in KMnO 4 Add high-purity water to the hydrothermally treated glass sheet, seal and heat to 100°C, keep warm for 0.5h, then filter...

Embodiment 2

[0035] A tempering method of high borosilicate fireproof tempered glass, carried out according to the following steps:

[0036] (1) Cut the original high borosilicate 4.0 glass sheet into a glass sheet with a thickness of 1mm and a size of 60mm×35mm, then polish and polish the upper and lower surfaces of the glass sheet, and ultrasonically clean it with deionized water;

[0037] (2) Add K with a concentration of 2mol / L to the glass slide after ultrasonic cleaning 2 Cr 2 o 7 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;

[0038] (3) in K 2 Cr 2 o 7 Add KMnO with a concentration of 4mol / L to the hydrothermally treated glass flakes 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;

[0039] (4) in KMnO 4 Add high-purity water to the hydrothermally treated glass sheet, seal and heat to 100°C, keep warm for 0.5h, then fil...

Embodiment 3

[0043] A tempering method of high borosilicate fireproof tempered glass, carried out according to the following steps:

[0044] (1) Cut the original high borosilicate 4.0 glass sheet into a glass sheet with a thickness of 1mm and a size of 60mm×35mm, then polish and polish the upper and lower surfaces of the glass sheet, and ultrasonically clean it with deionized water;

[0045] (2) Add K at a concentration of 1mol / L to the glass slide after ultrasonic cleaning 2 Cr 2 o 7 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;

[0046] (3) in K 2 Cr 2 o 7 Add KMnO with a concentration of 3mol / L to the hydrothermally treated glass flakes 4 solution, seal and heat to 90°C, keep warm for 2.5h, then filter out the glass piece and wash it with high-purity water;

[0047] (4) in KMnO 4 Add high-purity water to the hydrothermally treated glass sheet, seal and heat to 100°C, keep warm for 0.5h, then filter out th...

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Abstract

The invention relates to a tempering method of high borosilicate fireproof tempered glass, which comprises the following steps: sequentially carrying out three-stage surface pretreatment on a high borosilicate 4.0 glass sheet, drying to obtain an ultra-pure glass sheet, preheating the ultra-pure glass sheet in a medium-temperature furnace, putting the ultra-pure glass sheet into potassium nitrate molten salt, carrying out ion exchange at 340-380 DEG C for 0.5-5 h, and cooling the ultra-pure glass sheet to room temperature along with the furnace; wherein the three-section type surface pretreatment specifically adopts K2Cr2O7 hydro-thermal treatment, KMnO4 hydro-thermal treatment and high-purity water hydro-thermal treatment in sequence. According to the high borosilicate 4.0 fireproof glass tempered through a chemical tempering method, the Na < + > exchange capacity reaches 80% or above, the ion exchange depth reaches 152 microns, the excellent tempering strength is achieved, meanwhile, the spontaneous explosion rate of the glass is reduced to 0.06%, the excellent fireproof performance is achieved, the fireproof temperature reaches 832 DEG C, and the fireproof time reaches about 190 min.

Description

technical field [0001] The invention relates to the technical field of fireproof glass tempering, in particular to a high borosilicate fireproof tempered glass and a tempering method thereof. Background technique [0002] Glass is a relatively transparent solid substance that forms a continuous grid structure during melting, and is a silicate non-metallic material that gradually increases in viscosity and hardens during cooling. The composition of ordinary glass chemical oxides is: Na 2 O CaO 6SiO 2 , and high borosilicate glass is a kind of borosilicate glass, with sodium oxide (Na 2 O), boron oxide (B 2 o 3 ), silicon dioxide (SiO 2 ) as a basic component of a glass whose composition is characterized by SiO 2 and B 2 o 3 The content is relatively high, reaching 78% and above 10% respectively, while the alkali content is very low, only 4%-6%. High borosilicate 4.0 glass has a linear expansion coefficient of 4.0±0.1×10 -6 / K, the borosilicate content in the glass c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C21/00C03C23/00B08B11/04B08B3/08B08B3/10B08B3/12
CPCC03C21/002C03C23/0075C03C23/0095B08B11/04B08B3/08B08B3/10B08B3/12B08B2203/007
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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