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Method for deplating sapphire plated layer by using waste polishing solution

A technology of waste polishing liquid and sapphire, which is applied in the field of glass surface treatment, can solve the problems of non-recyclable, complex components, environmental pollution, etc., and achieve the effect of ensuring crystal purity, good compactness and corrosion resistance, and improving economic benefits

Active Publication Date: 2015-04-22
ZHEJIANG XINGXING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because most of the polishing liquid in the AG process is a liquid with strong acidity, resulting in a large amount of acidic waste liquid, strong acidity, causing serious pollution to the environment, and because the composition of the polishing liquid is more complicated after the glass is processed, can not be reused

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In this embodiment, it is mainly used to plate TiO on the surface 2 Deplating treatment of film sapphire

[0019] The waste polishing solution produced in the AG process described in this embodiment mainly includes hydrofluoric acid, sulfuric acid and ammonium fluoride.

[0020] Mix the waste polishing solution and water generated in the above AG process to form a mixed solution, so that the pH value is controlled below the pH value of 1. If the pH value is not within this range, water can be added to adjust it for the next step of deplating treatment ;

[0021] Plating TiO on the surface that needs to be stripped 2 The film sapphire is put into the above mixed solution and soaked at room temperature for deplating treatment for 35 seconds (s). After the deplating treatment is completed, it is rinsed with clean water to obtain the corresponding product.

[0022] The performance index of the stripped sapphire is tested, and the specific test results are as follows:

...

Embodiment 2

[0027] In this embodiment, it is mainly used to plate Ti on the surface 3 o 5 Deplating treatment of film sapphire

[0028] The waste polishing solution produced in the AG process described in this embodiment mainly includes hydrofluoric acid, sulfuric acid and ammonium fluoride.

[0029] Mix the waste polishing liquid and water generated in the above-mentioned AG process to form a mixed liquid, so that the pH value is controlled below the pH value of 1. If the pH value is not within this range, water can be added for adjustment, and the hydrogen in the mixed liquid The mass content of hydrofluoric acid is 45wt%, and is used for the next step of deplating treatment;

[0030] Plating Ti on the surface that needs to be stripped 3 o 5The film sapphire is put into the above mixed solution and soaked at 20°C for deplating treatment for 45 seconds (s). After the deplating treatment is completed, it is rinsed with clean water to obtain the corresponding product.

[0031] The per...

Embodiment 3

[0035] In this embodiment, it is mainly used for deplating treatment of Ti-coated sapphire on the surface

[0036] The waste polishing solution produced in the AG process described in this embodiment mainly includes hydrofluoric acid, sulfuric acid and ammonium fluoride.

[0037] Mix the waste polishing liquid and water generated in the above-mentioned AG process to form a mixed solution, so that the pH value is controlled below the pH value of 1. If the pH value is not within this range, water can be added for adjustment, and the hydrogen in the mixed solution The mass content of hydrofluoric acid is 40wt%, which is used for the next step of deplating treatment;

[0038] Put the Ti-coated sapphire on the surface that needs to be deplated into the above mixture and soak it at 28°C for 40 seconds (s) for deplating treatment. After the deplating treatment is completed, rinse it with clean water to obtain the corresponding product.

[0039] The performance index of the stripped ...

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Abstract

The invention relates to a method for deplating a sapphire plated layer by using a waste polishing solution, belongs to the technical field of glass surface treatment and aims at realizing reuse of the waste polishing solution in an AG (anti-glare glass) process and further ensuring the performance of sapphire after deplating. The invention provides the method for deplating the sapphire plated layer by using the waste polishing solution. The method comprises the following steps: mixing the waste polishing solution produced in the AG process and water to form a mixed solution, and controlling the pH value below 1 for further deplating treatment; soaking the surface-coated sapphire to be deplated in the mixed solution, performing deplating treatment, and cleaning with the water after deplating treatment to obtain a corresponding product. By adopting the method provided by the invention, the reuse of the waste polishing solution is realized, thereby turning waste into treasure, improving economic benefits and further ensuring the crystal purity, the surface roughness and the transmittance of the sapphire after deplating; and furthermore, the process flow is simple and the operation is easy.

Description

technical field [0001] The invention relates to a method for deplating a sapphire coating layer by using waste polishing liquid, and belongs to the technical field of glass surface treatment. Background technique [0002] Tempered plexiglass is currently the most widely used type of touch screen. Although chemically strengthened tempered glass has higher hardness, its hardness is still limited. During use, it is still easy to form scratches on the surface of the panel. In order to protect Most screens require a protective film. The increase of the protective film affects the light transmittance of the screen. Due to the high hardness and good light transmittance of sapphire, and with the rapid development of science and technology, it is widely used in sapphire touch screens or cover plates in electronic products such as mobile phones, handheld computers, car navigators, and notebook computers. On the other hand, with the development of science and technology, people's app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/53
Inventor 王先玉夏永光
Owner ZHEJIANG XINGXING TECH CO LTD
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