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High hardness transparent glass-ceramic and preparation method thereof

A glass-ceramic and high-hardness technology, applied in the field of glass ceramics, can solve problems such as low transmittance, fragility, and shortened battery life, and achieve the effects of high transparency, low cost, and good visible light performance

Inactive Publication Date: 2016-05-25
CDGM OPTICAL GLASS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The impact resistance of sapphire is stronger than that of glass, but sapphire glass is about 10 times more expensive than high-aluminosilicate glass, and it consumes about 100 times more energy. The visible light transmittance of 1mm sapphire is 80%. The transmittance is relatively low, which means that the battery life is shortened, and it has disadvantages such as fragile

Method used

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preparation example Construction

[0033] The preparation method of the present invention comprises the following steps:

[0034] (a) Ingredients

[0035] According to the weight composition content of the precursor glass, where MgO, Na 2 O, K 2 O is introduced as carbonate, nitrate or sulfate, and other components are introduced as oxides. According to the weight ratio, weigh the weight of the raw material, pour it into the mixer, and mix it evenly as the precursor glass raw material;

[0036] (b) Melting

[0037] Put the above-mentioned precursor glass raw material into the melting furnace, melt and clarify at high temperature, dissolve the precursor glass raw material into a high-temperature glass stock solution, and remove bubbles and foreign matter in the high-temperature glass stock solution;

[0038] (c) Forming and annealing

[0039] The molten high-temperature glass stock solution is molded by cooling in a hot mold at a certain temperature out of the furnace, or formed by float method or pressing ...

Embodiment 1

[0045] First, 62% SiO by weight 2 , 18% Al 2 o 3 , 10% MgO and 5% TiO 2 , 3% ZrO 2 , 0.5% P 2 o 5 and 1.5% clarifier Sb 2 o 3 Weigh it out, and then put it all into a V-shape mixer and mix it thoroughly as a precursor glass raw material.

[0046] Then put the prepared precursor glass raw materials into the electric furnace, melt at 1600°C for 8 hours, clarify at 1650°C for 10 hours, and then take the molten glass out of the furnace at 1600°C, and shape it through a mold. The temperature is at 200°C, blown cooling is carried out during molding, and the prepared glass is roughly annealed at 680°C in a muffle furnace.

[0047] Put the prepared glass into a high-temperature furnace for heat treatment. The heat treatment process includes two stages of crystal nucleus precipitation and crystallite growth. In the stage of crystal nucleus precipitation, the temperature in the muffle furnace is kept at 750 ° C for 2 hours. Generate as many crystal nuclei as possible in the gla...

Embodiment 2

[0049] Firstly mix 60% SiO by weight 2 , 20% Al 2 o 3 , 8% MgO, 1% K 2 O, 1% Na 2 O, 5% TiO 2 , 3% ZrO 2 , 0.5% P 2 o 5 and 1.5% clarifier Sb 2 o 3 Weigh it out, and then put it all into the mixer and mix it thoroughly as the precursor glass raw material;

[0050] Then put the prepared precursor glass raw materials into the electric furnace, melt at 1600°C for 4 hours, clarify at 1650°C for 4 hours, then take the molten glass out of the furnace at 1550°C, and make glass by float molding , Rough annealing in a muffle furnace at 680 °C.

[0051] Put the prepared glass into a high-temperature furnace for heat treatment. The heat treatment process includes two stages of crystal nucleus precipitation and crystallite growth. In the stage of crystal nucleus precipitation, the temperature in the muffle furnace is kept at 700 ° C for 4 hours. Generate as many crystal nuclei as possible in the glass, then raise the temperature in the muffle furnace to about 900°C to enter the...

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Abstract

The present invention provides a high hardness transparent glass-ceramic and a preparation method thereof, wherein the high hardness transparent glass-ceramic comprises, by weight, 55.0-70.0% of SiO2, 15.0-20.0% of Al2O3, 0-10.0% of MgO, and 0-12.5% of ZnO, and must contain one of MgO and ZnO, and the crystallized glass contains the micro-crystal of the spinel crystal. According to the present invention, the suitable precursor glass is used to carry out the heat treatment and the micro-crystal is subjected to crystallization precipitation from the glass matrix so as to prepare the high hardness transparent glass-ceramic, wherein the Mohs hardness is more than 7, and the 1 mm glass visible light transmittance is greater than 80%; and the high hardness transparent glass-ceramic overcomes the easy scratching problem f the common optical glass, and can be used as mobile phone protection panels, optical instruments, and protection lens, magnetic disk substrates, liquid crystal display device panels r other optoelectronic device protection lens and the like on communication equipment.

Description

technical field [0001] The invention relates to a high-hardness transparent glass-ceramic and a preparation method thereof, belonging to the technical field of glass ceramics. Background technique [0002] Since entering the era of touch control marked by Apple products, capacitive touch screens have become the first choice for terminals such as mobile phones, tablets, and touch notebooks due to their advantages such as stable performance and good tactile feeling. Regardless of the touch technology, the cover is an essential protective component, and the glass cover has gradually become the mainstream of the cover due to its high permeability and strong scratch resistance. [0003] The Mohs hardness value of the high-aluminosilicate cover glass currently on the market is generally 6. The glass components under this hardness are assembled on mobile phones, tablets, and touch notebooks, and the sand or dust contains silicon dioxide (SiO 2 , Mohs hardness 7H), when it rubs aga...

Claims

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Application Information

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IPC IPC(8): C03C10/14
CPCC03C3/085C03C3/095C03C3/097C03C10/0045C03B32/02C03C2204/00
Inventor 原保平于天来苏学剑
Owner CDGM OPTICAL GLASS
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