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Composite reinforcing method of high-alkali aluminosilicate glass

A technology of aluminosilicate glass and silicate glass, which is applied in the field of inorganic glass reinforcement, can solve the problems of reduced glass impact resistance, high surface compressive stress, poor toughness and impact resistance, etc., and achieve the goal of improving the overall mechanical properties Effect

Active Publication Date: 2021-02-12
CHINA BUILDING MATERIALS ACAD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In particular, for thinner peralkali aluminosilicate glass, the surface compressive stress is too high, even if the stress layer is shallow, the toughness and impact resistance will be relatively poor
At present, although the one-step chemical strengthening method disclosed in the prior art can significantly improve the scratch resistance of glass, the central tensile stress of the glass is relatively large, and the high central tensile stress will significantly reduce the impact resistance of the glass and weaken the mechanical properties of the glass.

Method used

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  • Composite reinforcing method of high-alkali aluminosilicate glass
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  • Composite reinforcing method of high-alkali aluminosilicate glass

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Effect test

Embodiment 1

[0059] This embodiment provides a composite reinforcement method for high alkali aluminosilicate glass, comprising the following steps:

[0060] (1) Chemical enhancement for the first time: prepare 50 kg of molten salt according to the molar ratio of 96% potassium nitrate, 3% sodium nitrate, 0.5% potassium hydroxide and 0.5% sodium hydroxide, put it into the salt tank and melt it in the muffle furnace Clarify for 24 hours to obtain mixed exchange molten salt;

[0061] Place the high-alkali aluminosilicate glass sample on the tooling rack and preheat it in a high-temperature furnace for 15 minutes at a temperature of 380°C, then immerse it in the molten mixed molten salt for ion exchange with the high-temperature molten salt. The exchange time is set to 4h, the exchange temperature is 420°C. After the exchange is completed, the tooling frame is taken out from the molten salt, and the temperature is lowered to room temperature at a cooling rate of 15°C / min. The glass sample is c...

Embodiment 2

[0065] This embodiment provides a composite reinforcement method for high alkali aluminosilicate glass, comprising the following steps:

[0066] (1) The first chemical enhancement: prepare 50kg of molten salt according to the molar ratio of 97% potassium nitrate, 2% sodium nitrate, 0.5% potassium hydroxide and 0.5% sodium hydroxide, put it into the salt tank and melt it in the muffle furnace And clarified for 24 hours to obtain mixed exchange molten salt;

[0067] Place the high-alkali aluminosilicate glass sample on the tooling rack and preheat it in a high-temperature furnace for 15 minutes at a temperature of 380°C, then immerse it in the molten mixed molten salt for ion exchange with the high-temperature molten salt. The exchange time is set to 4h, the exchange temperature is 420°C. After the exchange is completed, the tooling frame is taken out from the molten salt, and the temperature is lowered to room temperature at a cooling rate of 15°C / min. The glass sample is clean...

Embodiment 3

[0071] This embodiment provides a composite reinforcement method for high alkali aluminosilicate glass, comprising the following steps:

[0072] (1) The first chemical treatment: prepare 50kg of molten salt according to the molar ratio of 98% potassium nitrate, 1% sodium nitrate, 0.5% potassium hydroxide and 0.5% sodium hydroxide, put it into the salt tank and melt it in the muffle furnace And clarified for 24 hours to obtain mixed exchange molten salt;

[0073]Place the high-alkali aluminosilicate glass sample on the tooling rack and preheat it in a high-temperature furnace for 15 minutes at a temperature of 380°C, then immerse it in the molten mixed molten salt for ion exchange with the high-temperature molten salt. The exchange time is set to 4h, the exchange temperature is 420°C. After the exchange is completed, the tooling frame is taken out from the molten salt, and the temperature is lowered to room temperature at a cooling rate of 15°C / min. The glass sample is cleaned ...

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Abstract

The invention relates to the technical field of inorganic glass reinforcement, particularly to a composite reinforcement method of high-alkali aluminosilicate glass. The composite enhancement method of the high-alkali aluminosilicate glass comprises the step of carrying out chemical enhancement on high-alkali aluminosilicate glass twice, wherein a thermal field-electric field composite treatment step is further included between the two chemical enhancement steps. According to the invention, the method is especially suitable for reinforcing thin high-alkali aluminosilicate glass for transparentpieces, and the prepared reinforced high-alkali aluminosilicate glass has high surface compressive stress, a deep stress layer and low internal tensile stress, so that the glass has excellent impactresistance, toughness, scratch resistance and overall mechanical property, and the application range of the thin high-alkali aluminosilicate glass is greatly widened.

Description

technical field [0001] The invention relates to the technical field of inorganic glass reinforcement, in particular to a composite reinforcement method for high-alkali aluminosilicate glass and the strengthened high-alkali aluminosilicate glass prepared therefrom. Background technique [0002] High-alkali aluminosilicate glass is a new type of high-strength glass with high aluminum and alkali content and is suitable for chemical strengthening. At present, many enterprises have achieved mass production and have a good market prospect. High alkali aluminosilicate glass due to the higher content of Al 2 o 3 , is very easy to chemically strengthen, and has excellent mechanical properties after strengthening, especially in terms of hardness, toughness and scratch resistance. It has high transmittance in the visible light band, and its application fields are constantly expanding. As the product cover material, high alkali aluminosilicate glass is being gradually applied to the f...

Claims

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Application Information

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IPC IPC(8): C03C21/00C03C3/085
CPCC03C21/003C03C3/085
Inventor 徐驰蓝知惟吴志远傅国英张文辉
Owner CHINA BUILDING MATERIALS ACAD
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