Glass toughening method and toughened glass

A glass strengthening and tempering glass technology, applied in the field of glass processing, can solve the problems of low tensile strength, micro-crack expansion, glass breakage, etc., and achieve the effect of improving glass strength, easy operation and little impact

Inactive Publication Date: 2018-07-20
AAC TECH PTE LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Glass is a typical brittle material with low tensile strength. The reason is that there are a large number of microcracks on the surface and inside of the glass. Under the action of external force and environmental medium, crack expansion is very easy to occur, so that the glass is damaged.
[0003] In related technologies, glass strengthening methods mainly use physical strengthening or chemical ion exchange strengthening to strengthen the compressive stress on the glass surface, which can effectively prevent the expansion of micro-cracks on the glass surface affected by external forces and improve the mechanical properties of the glass. However, when the external force reaches To a certain extent or for a long time, microcracks will still expand, resulting in broken glass

Method used

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  • Glass toughening method and toughened glass

Examples

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Comparison scheme
Effect test

Embodiment 1

[0045] This embodiment provides a method for strengthening glass, the method for strengthening glass includes the following steps:

[0046](1) Soak the glass in a strong treatment agent at 20°C for 1 minute, and constantly rotate the glass. The components of the strong treatment agent are: hydrofluoric acid: 1%; sulfuric acid: 1%; lemon Acid: 1%; the balance is water. The mass concentration of the hydrofluoric acid is 20%. After the reaction was completed, the glass was ultrasonically cleaned and dried in a nitrogen environment.

[0047] (2) Preheat the dried glass to slowly increase the temperature to 380° C., place the preheated glass in molten potassium nitrate salt at 380° C., and strengthen it for 200 minutes to obtain tempered glass.

[0048] (3) Take out the tempered glass, slowly anneal to room temperature, ultrasonically clean the tempered glass and dry it in a nitrogen environment.

[0049] (4) Place the dried tempered glass in a finishing solution at 30°C for 5 m...

Embodiment 2

[0051] This embodiment provides a method for strengthening glass, the method for strengthening glass includes the following steps:

[0052] (1) Soak the glass in a strong treatment agent at 25°C for 5 minutes, and constantly rotate the glass. The components of the strong treatment agent are: hydrofluoric acid: 5%; nitric acid: 25%; glucose Acid: 10%; balance is water. The mass concentration of the hydrofluoric acid is 30%. After the reaction was completed, the glass was ultrasonically cleaned and dried in a nitrogen environment.

[0053] (2) Preheating the dried glass to slowly increase the temperature to 400° C., place the preheated glass in molten potassium nitrate salt at 400° C., and strengthen it for 300 minutes to obtain tempered glass.

[0054] (3) Take out the tempered glass, slowly anneal to room temperature, ultrasonically clean the tempered glass and dry it in a nitrogen environment.

[0055] (4) Place the dried tempered glass in a finishing solution at 40°C for ...

Embodiment 3

[0057] This embodiment provides a method for strengthening glass, the method for strengthening glass includes the following steps:

[0058] (1) Soak the glass in a strong treatment agent at 30°C for 10 minutes, and constantly rotate the glass. The components of the strong treatment agent are: hydrofluoric acid: 10%; phosphoric acid: 50%; Diaminetetraacetic acid: 20%; the balance is water. The mass concentration of the hydrofluoric acid is 40%. After the reaction was completed, the glass was ultrasonically cleaned and dried in a nitrogen environment.

[0059] (2) Preheating the dried glass to slowly increase the temperature to 450° C., place the preheated glass in molten sodium nitrate salt at 450° C., and strengthen it for 400 minutes to obtain tempered glass.

[0060] (3) Take out the tempered glass, slowly anneal to room temperature, ultrasonically clean the tempered glass and dry it in a nitrogen environment.

[0061] (4) Place the dried tempered glass in a finishing sol...

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Abstract

The invention provides a glass toughening method and toughened glass. The glass toughening method comprises the following steps: placing glass in a strong treating agent for pretreatment; placing theglass treated in step 1 in molten salt at preset temperature and enabling the glass to make contact with the molten salt for preset duration to obtain the toughened glass; placing the toughened glasstreated in step 2 in a fine treating agent for fine treatment to remove microcracks, caused by tempering amplification and/or ion extrusion, of the toughened glass. The invention further provides thetoughened glass prepared with the glass toughening method. According to the glass toughening method and the toughened glass, the microcracks are removed by the strong treating agent and the fine treating agent respectively before and after tempering, so that the microcracks in all areas of the glass can be removed uniformly, shape and dimension of the glass are not limited, the method is simple, easy to operate and high in efficiency, influence on a temper stress layer is small, and glass strength is improved greatly.

Description

【Technical field】 [0001] The invention relates to the field of glass processing, in particular to a glass strengthening method and strengthening glass. 【Background technique】 [0002] Glass is an amorphous inorganic substance with irregular structure after melting, cooling, and solidification. It has good mechanical properties, excellent optical properties, and processability, and is widely used in the display field. However, with the continuous advancement of technology, the trend of thinning and thinning mobile phones, displays and other related products has gradually revealed the shortcomings of glass products themselves. Glass is a typical brittle material with low tensile strength. The reason is that there are a large number of microcracks on the surface and inside of the glass. Under the action of external force and environmental medium, cracks are easily expanded, thus destroying the glass. [0003] In related technologies, glass strengthening methods mainly use phys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C15/00C03C21/00C03C23/00
CPCC03C15/00C03C21/001C03C23/00
Inventor 严绪东祁呈刚邹攀
Owner AAC TECH PTE LTD
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