Additive-containing single-crystal-state potassium nitrate glass-reinforcing molten salt and glass reinforcing technology

A technology of glass strengthening and potassium nitrate, which is applied in glass tempering, glass production, glass manufacturing equipment, etc. It can solve the problems of not accurately giving polycrystalline components to determine the crystal state, complex additive components, and difficult operations. Achieve the effect of improving product quality, simple components, and avoiding secondary pollution

Active Publication Date: 2014-11-05
湖南丹化农资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Although a lot of research has been done on additives for glass strengthening and considerable achievements have been made, there are still many disadvantages in the application of existing additives in the ion exchange process.
It is mainly reflected in that, on the one hand, the definite crystal state of the selected polycrystalline components in the invented

Method used

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  • Additive-containing single-crystal-state potassium nitrate glass-reinforcing molten salt and glass reinforcing technology
  • Additive-containing single-crystal-state potassium nitrate glass-reinforcing molten salt and glass reinforcing technology
  • Additive-containing single-crystal-state potassium nitrate glass-reinforcing molten salt and glass reinforcing technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Soda-lime-silica glass is processed into thin slices of 350mm*40mm*3mm.

[0035] Use alcohol and acetone to wipe the dust and oil on the glass surface (or ultrasonic cleaning) respectively, and put the processed glass sheet into a drying oven for drying.

[0036] Formulation of single crystalline potassium nitrate glass-strengthening molten salt with additive, α-KNO 3 97%, silicon dioxide 2.05%, KCl 0.45%.

[0037] The cleaned and dried glass flakes were preheated in a muffle furnace for 45 minutes at a constant temperature of 350°C.

[0038] Grind the prepared single-crystal potassium nitrate glass-strengthening molten salt containing additives to fineness and preheat for 50 minutes at a constant temperature of 340°C.

[0039] Submerge the preheated glass flakes into the preheated single crystalline potassium nitrate glass-strengthening molten salt containing additives, and rapidly raise the furnace temperature to 430°C, and conduct constant temperature treatment for...

Embodiment 2

[0042] Soda-lime-silica glass is processed into thin slices of 350mm*40mm*3mm.

[0043] Use alcohol and acetone to wipe the dust and oil on the glass surface (or ultrasonic cleaning) respectively, and put the processed glass sheet into a drying oven for drying;

[0044] Formulation of single crystalline potassium nitrate glass-strengthening molten salt with additive, α-KNO 3 98%, silicon dioxide 1.6%, KCl 0.4%.

[0045] The cleaned and dried glass flakes were preheated in a muffle furnace for 55 minutes at a constant temperature of 350°C.

[0046] Grind the prepared single-crystal potassium nitrate glass-strengthening molten salt containing additives to fineness and preheat for 50 minutes at a constant temperature of 340°C.

[0047] Submerge the preheated glass flakes into the preheated single crystalline potassium nitrate glass-strengthening molten salt containing additives, and rapidly raise the furnace temperature to 430°C, and conduct constant temperature treatment for 6...

Embodiment 3

[0050] Soda-lime-silica glass is processed into thin slices of 350mm*40mm*3mm.

[0051] Use alcohol and acetone to wipe the dust and oil on the glass surface (or ultrasonic cleaning) respectively, and put the processed glass sheet into a drying oven for drying.

[0052] Formulation of single crystalline potassium nitrate glass-strengthening molten salt with additive, α-KNO 3 98.5%, silicon dioxide 1.125%, KCl 0.375%.

[0053] The cleaned and dried glass flakes were preheated in a muffle furnace for 50 minutes at a constant temperature of 350°C.

[0054] Grind the prepared additive-containing single crystal potassium nitrate glass-strengthening molten salt and preheat it for 60 minutes at a constant temperature of 340°C.

[0055] Submerge the preheated glass flakes into the preheated single crystalline potassium nitrate glass-strengthening molten salt containing additives, rapidly raise the furnace temperature to 410°C, and conduct constant temperature treatment for 7 hours t...

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Abstract

The invention discloses an additive-containing single-crystal-state potassium nitrate glass-reinforced molten salt and a glass reinforcing technology. The additive-containing single-crystal-state potassium nitrate glass-reinforced molten salt is composed of the following compositions in percent by weight: 97%-98.5% of KNO3, 1.125%-2.55% of silicon dioxide, and 0.225%-0.75% of KCl. Compared with the prior art, the additive-containing single-crystal-state potassium nitrate glass-reinforced molten salt has the following substantially advantages: 1, the crystal form of silicon dioxide in the reinforced molten salt is determined as an amorphous state, and addition of amorphous silicon dioxide helps to improve the chemical durability and mechanical performances of chemical reinforced glass, and also gives play to adsorption effect on impurities in the molten salt; and 2, KCl in the reinforced molten salt helps to accelerate the ion exchange reaction through induction effect, and also gives play to effect of purifying the molten salt. The single-crystal-state reinforced molten salt helps to substantially reduce production cost and improve the reinforced glass quality, and has wide application prospect.

Description

technical field [0001] The invention relates to a glass-strengthening molten salt and a glass-strengthening process thereof. Background technique [0002] With the development of digital technology, network technology and the advancement of informatization, "display ubiquitous" has become an important feature for human beings to engage in social and economic activities. At present, the large-screen smartphone and 3G markets have entered a stage of rapid development, which puts forward higher performance requirements for the use of mobile phone screen glass. At present, the chemical high-end thin glass used for mobile phone touch screens, etc. is made by placing ordinary flat glass in high-purity potassium nitrate molten salt and exchanging sodium and potassium ions in the presence of special additives. [0003] Chemically strengthened glass is also called ion-exchanged glass due to the inherent characteristics of its production process. Factors such as the quality of potas...

Claims

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Application Information

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IPC IPC(8): C03B27/03
CPCY02P40/57
Inventor 章泽成段正康闫建华吴政达
Owner 湖南丹化农资有限公司
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