Glass ceramic and preparation method thereof, glass protection layer, glass cover plate and electronic device

A technology of glass-ceramic and glass cover, which is applied to glass protective layer, glass cover and electronic devices, glass-ceramic and its preparation field, can solve the problem of surface microhardness reduction, difficult impact resistance and other problems of ultra-thin glass products. Anti-drop performance, poor chemical tempering effect, etc., to achieve the effect of high surface microhardness, low cost, and excellent tempering performance

Active Publication Date: 2022-01-04
QINGYUAN CSG NEW ENERGY SAVING MATERIALS CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the traditional tempering process of glass-ceramics, the exchange efficiency between ions in molten salt and ions in glass is not high, and the effect of chemical tempering is poor. It is difficult to greatly improve the impact resistance of ultra-thin glass products obtained. and drop resistance
[0005] In addition, the traditional tempering method of glass-ceramics will produce the effect of "decrystallization", and the microhardness of the surface of the obtained ultra-thin glass products will be greatly reduced.

Method used

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  • Glass ceramic and preparation method thereof, glass protection layer, glass cover plate and electronic device
  • Glass ceramic and preparation method thereof, glass protection layer, glass cover plate and electronic device

Examples

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preparation example Construction

[0039] The invention provides a method for preparing glass ceramics, comprising the steps of:

[0040] Carrying out crystallization treatment on the precursor glass to prepare a glass-ceramics prefabricated part;

[0041] Mixing the glass-ceramic preform with the first molten salt for the first chemical toughening;

[0042] Wherein, the first molten salt comprises at least one of sodium nitrate, potassium nitrate and lithium nitrate;

[0043] The mass proportion of sodium nitrate in the first molten salt is a; the temperature of the first chemical tempering is T 1 ℃, the time of the first chemical toughening is t 1 hour; the glass transition point temperature of the glass-ceramic preform is T g ℃;

[0044] 10%≤a1 +T 1 =(0.75T g -80a)~(0.83T g -100a); or

[0045] 50%≤a≤100%, 10t 1 +T 1 =(0.75T g -50a)~(0.83T g -80a).

[0046]The inventors found that when the tempering process in the first step meets the above conditions, the glass-ceramics can maintain a high ion e...

Embodiment 1

[0076] The present embodiment provides a kind of preparation method of glass ceramics, specifically as follows:

[0077] (1) In terms of weight percentage, the raw materials of the precursor glass are mixed according to the following composition: 69.24% SiO 2 , 8.45% Al 2 o 3 , 12.08% Li 2 O, 2.33% Na 2 O, 4.31% ZrO 2 , and a P of 3.59% 2 o 5 , B 2 o 3 Mixture with MgO.

[0078] (2) Crystallization treatment: first treat at 570°C for 4h, then at 740°C for 1h, the heating rate is 2°C / min, the glass transition point temperature T of the glass-ceramics preform g It is 717°C.

[0079] (3) The first chemical tempering: Mix the glass-ceramic prefabricated parts prepared above with the first molten salt, use Suzhou Xinfu tempering furnace for tempering treatment, and use a contact thermometer for temperature correction, at 490°C The first chemical toughening treatment was carried out for 6 hours; wherein, in terms of mass ratio, the composition of the first molten salt was...

Embodiment 2

[0082] The present embodiment provides a kind of preparation method of glass ceramics, specifically as follows:

[0083] (1) In terms of weight percentage, the raw materials of the precursor glass are mixed according to the following composition: 73.23% SiO 2 , 6.62% Al 2 o 3 , 8.86% Li 2 O, 1.69% Na 2 O, 6.71% ZrO 2 , and a P of 2.89% 2 o 5 , B 2 o 3 Mixture with MgO.

[0084] (2) Crystallization treatment: first treat at 590°C for 6h, then at 670°C for 4h, then at 750°C for 1h, the heating rate is 10°C / min, the glass transition point temperature T of the glass-ceramic preform g It is 725°C.

[0085](3) The first chemical tempering: Mix the glass-ceramic prefabricated parts prepared above with the first molten salt, use Suzhou Xinfu tempering furnace for tempering treatment, and use a contact thermometer for temperature correction, at 470°C The first chemical tempering treatment was carried out for 9 hours to prepare a glass intermediate; wherein, in terms of mass ...

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Abstract

The invention provides a preparation method of glass ceramic, the preparation method comprises: carrying out a crystallization treatment on precursor glass to prepare a glass ceramic prefabricated part; mixing the glass ceramic prefabricated part with first fused salt, and carrying out first chemical tempering; the first molten salt comprises at least one of sodium nitrate, potassium nitrate and lithium nitrate; the mass ratio of sodium nitrate in the first molten salt is a; the temperature of the first-time chemical tempering is T1 DEG C, and the time of the first-time chemical tempering is t1 hours; the glass transition point temperature of the glass ceramic prefabricated part is Tg DEG C; 10% < = a < 50%, and 10t1 + T1 = (0.75 Tg-80a)-(0.83 Tg-100a); or 50% < = a < = 100%, and 10t1 + T1 = (0.75 Tg-50a)-(0.83 Tg-80a).

Description

technical field [0001] The invention relates to the field of glass, in particular to a glass-ceramic and a preparation method thereof, a glass protective layer, a glass cover plate and electronic devices. Background technique [0002] In recent years, with the rapid development of the electronic information industry, smart electronic products such as portable communication, video, wearable, traffic display and other equipment are developing in the direction of thinness, light weight, high strength and high hardness. As a composite material combining glass phase and crystal phase, glass-ceramic has high mechanical strength, and by controlling the content of crystal phase and grain size, it can effectively prevent the crack propagation and differentiation cracks of glass products, thereby reducing the material probability of failure. [0003] When glass-ceramics is used as ultra-thin protective glass for display panels or some electronic equipment, its thickness is usually le...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B32/02C03C21/00C03C6/04C03C10/04C03C10/12
CPCC03B32/02C03C21/002C03C1/00C03C10/0027Y02P40/57
Inventor 康庆伟平文亮周胜权肖子凡刘红刚
Owner QINGYUAN CSG NEW ENERGY SAVING MATERIALS CO LTD
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