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Glass-ceramic and its preparation method and application

A technology of glass-ceramic and crystalline phase, applied in the field of glass-ceramic and its preparation, can solve the problems of impact resistance to sharp objects, insufficient drop resistance, decreased light transmittance, increased haze, etc.

Active Publication Date: 2022-04-26
SICHUAN XUHONG OPTOELECTRONICS TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the problems of the protection glass of display devices in the prior art, such as insufficient impact resistance of sharp objects, insufficient drop resistance, decreased light transmittance, increased haze, etc., to provide glass-ceramic and its preparation method and application

Method used

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  • Glass-ceramic and its preparation method and application
  • Glass-ceramic and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-10

[0184] The basic glass substrate prepared by using the float process, the composition of the basic glass substrate is shown in Table 1, and the thickness is 0.7 mm.

[0185] Table 1

[0186]

[0187] Cutting, grinding, polishing and other processes are performed on the obtained basic glass substrate to obtain a 140mm×70mm×0.7mm sheet, and then carry out microcrystallization treatment. During the whole microcrystallization treatment process, the glass carrier is graphite carrier and filled with Nitrogen was used as a protective gas. The nucleation temperature, nucleation time, crystallization temperature and crystallization time are collectively referred to as the heat treatment system, and the specific heat treatment system is described in Table 2 below.

[0188] Table 2

[0189]

[0190] Place the microcrystallized basic glass substrate on a stainless steel sample holder and use molten NaNO 3 and molten KNO 3 Secondary chemical strengthening treatment (conditions as...

Embodiment 11-20

[0207] The basic glass substrate prepared by using the overflow process, the composition of the basic glass substrate is shown in Table 5, and the thickness is 0.5 mm.

[0208] table 5

[0209]

[0210] Cutting, grinding, polishing and other processes are carried out on the base glass to obtain flakes with a size of 140mm×70mm×0.5mm. After that, microcrystallization treatment is carried out. During the whole process of microcrystallization treatment, the glass carrier adopts graphite carrier and is filled with specific gas nitrogen as a protective gas. The nucleation temperature, nucleation time, crystallization temperature and crystallization time are collectively referred to as the heat treatment regime, and the specific heat treatment regime is described in Table 6 below.

[0211] Table 6

[0212]

[0213] Referring to the method described in Example 1, the secondary chemical strengthening treatment was carried out, and the specific conditions are shown in Table 7, ...

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Abstract

The invention relates to the field of glass, and specifically discloses glass-ceramic and its preparation method and application. Based on the total weight of the glass-ceramic, the glass-ceramic contains: 52‑65% by weight SiO 2 , 12‑27 wt% Al 2 o 3 , 5‑19 wt% Na 2 O, 0‑3.5% by weight of K 2 O, 2‑7 wt% MgO, 3‑10 wt% Li 2 O, 0.5‑5% by weight ZrO 2 , 0‑4.5 wt% TiO 2 ; The glass-ceramic comprises a crystallite part having a spherical crystal phase and a glass phase part, and the degree of devitrification is 10-25% by weight, and the spherical crystal phase comprises lithium disilicate, β-quartz, β-quartz solid solution, Mg 2 TiO 4 and at least one of lithium metasilicate. The glass-ceramic has high light transmittance, high strength, excellent impact resistance and excellent drop resistance, and is especially suitable as a protective glass for display devices.

Description

technical field [0001] The invention relates to the field of glass, in particular to glass-ceramic and its preparation method and application. Background technique [0002] With the development of communication technology, the thinner, larger screen and portability of mobile terminal equipment has quickly become the mainstream of the market. Cover glassization has become an inevitable trend, which puts forward higher requirements for front and rear cover glass materials that protect display devices. How to increase the mechanical strength of the glass while making the glass thinner and larger, so as to ensure that the mobile communication device falls from a high place (above 100cm) to a rough surface (such as Concrete floors, gravel, asphalt roads, etc.) will not cause the screen to break, which has become the focus of research and development by major original film factories and cover factories. [0003] The protective glass for display devices currently on the market is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/14C03C10/04C03C10/02C03C21/00C03B32/02
CPCC03C10/0009C03C21/002C03B32/02C03C10/00
Inventor 黎展宏戴佳卫欧阳辰鑫刘再进宫汝华何根梁雅琼沈于乔
Owner SICHUAN XUHONG OPTOELECTRONICS TECH
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