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Glass composition, glass substrate and chemical strengthening method thereof

A technology for glass substrates and compositions, applied in the field of glass compositions, glass substrates and their chemical strengthening, can solve the problems of low density, unsatisfactory surface stress and surface hardness, and inability to completely resist falling.

Active Publication Date: 2017-03-22
TUNGHSU GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of chemically toughened glass substrates as the protection device for touch devices has greatly improved the performance of traditional cover glass substrates. Its density is low and it is portable, but the surface stress of the existing glass after chemical toughening treatment And the surface hardness is not ideal enough, the anti-damage performance of the prepared chemically tempered glass needs to be improved, and it is still unable to completely resist external forces such as dropping and abrasion

Method used

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  • Glass composition, glass substrate and chemical strengthening method thereof
  • Glass composition, glass substrate and chemical strengthening method thereof

Examples

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preparation example Construction

[0047] The method for preparing the chemically toughened glass substrate of the present invention is by making the common glass substrate prepared by the above composition carry out chemical toughening treatment in molten salt containing potassium ions, and a layer of compressive stress layer will be formed on the glass surface, so that the glass surface has The higher surface stress and hardness improve the surface scratch resistance of the chemically toughened glass substrate, making it resistant to external forces such as dropping and abrasion.

[0048] Wherein, the specific operating conditions for preparing the glass substrate described in step (1) are well known to those skilled in the art. For example, the above composition can be weighed according to parts by weight and fully mixed uniformly, and then the molten glass is poured into the platinum In a rhodium crucible, keep warm at 1550-1650°C for 5-10h, preferably at 1580-1620°C for 6-8h; cool the molten glass to the te...

Embodiment 1-11

[0059] The components and contents of the compositions used to prepare glass in Examples 1-11 are shown in Table 1.

[0060] The glass substrates in each embodiment are prepared according to the following steps: weigh each component according to the weight part and fully mix them uniformly, pour the mixed components into a platinum-rhodium crucible, and keep the temperature at 1600°C for 8 hours; The temperature of the liquid is cooled to the temperature range required for forming, forming on a stainless steel plate, and annealing at 630°C for 0.5h to obtain a glass substrate. The density, expansion coefficient, strain point, annealing point and softening point of the glass substrate are tested, and the test results Listed in Table 1.

[0061] According to the measured annealing point, after the glass substrate is precision annealed, it is cut, ground, and polished to form a 60mm×45mm×0.7mm sheet, and placed in 380°C molten KNO 3 Chemical toughening treatment was carried out ...

Embodiment 12

[0064] The composition and content of the composition used to prepare the glass in this example are the same as in Example 1, and the preparation method of Example 1 is adopted, except that the temperature of the molten salt containing potassium ions is 350°C, and the time of immersion is 2.5h .

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Abstract

The invention relates to a glass composition, a glass substrate and a chemical strengthening method thereof. The composition contains SiO2, Al2O3, K2O, Na2O, ZrO2 and B2O3, wherein relative to 100 parts by weight of SiO2, the Al2O3 content is 25-40 parts by weight, the K2O content is 1-9 parts by weight, the Na2O content is 15-40 parts by weight, the ZrO2 content is 0.05-3 parts by weight, and the B2O3 content is 1-15 parts by weight; and R is calculated to be 6.87-13.89 according to the formula below: R=0.206w(Al2O3)+0.17w(K2O)-0.006w(Na2O)+0.13w(ZrO2)+0.37w(B2O3).Since the disclosed composition has the defined specific components and content ranges thereof, glass prepared from the composition has high strain point and softening point and low melting temperature, has excellent chemical strengthening property, and can be used for preparing the chemically-strengthened glass substrate. The surface of the chemically-strengthened glass substrate prepared according to the method has high surface stress and hardness, so that the surface scratch resistance of the chemically-strengthened glass substrate is improved, thereby ensuring that the chemically-strengthened glass substrate can resist the effect of external forces such as fall, abrasion and the like.

Description

technical field [0001] The invention relates to the field of glass manufacturing, in particular to a glass composition, a glass substrate and a chemical strengthening method thereof. Background technique [0002] With the popularization of electronic equipment with touch devices such as mobile phones, tablet computers, bank terminal equipment, and vehicle-mounted systems, the requirements for wear resistance of touch devices are also increasing. The traditional method for the wear and tear of touch devices is to use surface The method of coating film, but this method not only increases the production process and cost, but also has certain defects in the service life. The use of chemically toughened glass substrates as the protection device for touch devices has greatly improved performance compared with traditional cover glass substrates. Its density is low and it is portable, but the surface stress of the existing glass after chemical toughening treatment And the surface h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/093C03C21/00
CPCC03C3/093C03C21/002
Inventor 李英春李青李兆廷
Owner TUNGHSU GRP
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