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Lithium aluminosilicate nanocrystalline transparent ceramic and preparation method and product thereof

A lithium aluminum silicate and transparent ceramic technology, applied in the chemical industry, can solve the problems of difficult processing, high thermal expansion coefficient, and poor plastic material properties, and achieve the effect of improving strength and fracture toughness, low thermal expansion coefficient, and improving performance

Pending Publication Date: 2020-08-28
SHENZHEN JINGJIANG YUNCHUANG TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In terms of material application, traditional metal materials can cause shielding or interference to signal transmission; plastic materials have poor characteristics, and it is difficult to meet people's requirements for the appearance of mid-to-high-end mobile phones, so inorganic non-metallic transparent materials have become the mainstream material for display covers , such as glass and ceramic
However, ceramics are expensive and difficult to process. At present, aluminosilicate glass covers are widely used, but they have low transparency and high thermal expansion coefficient.

Method used

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  • Lithium aluminosilicate nanocrystalline transparent ceramic and preparation method and product thereof
  • Lithium aluminosilicate nanocrystalline transparent ceramic and preparation method and product thereof
  • Lithium aluminosilicate nanocrystalline transparent ceramic and preparation method and product thereof

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preparation example Construction

[0051] The present application also provides a preparation method of the lithium aluminum silicate nanocrystalline transparent ceramic, comprising the following steps:

[0052] Step S1: mixing the above raw materials in proportion and placing them in a reaction kettle, melting the mixed raw materials to obtain a melt.

[0053] Wherein, the raw materials are all oxides, and the purity of the raw materials is greater than or equal to 99.5%. The raw material includes at least SiO 2 、Al 2 o 3 、Na 2 O, K 2 O, CaO and P 2 o 5 .

[0054] Specifically, the raw materials are weighed according to a certain ratio, and then mixed in a mixer; the mixed raw materials are put into a melting furnace and heated to 1200°C-1800°C to melt the raw materials, The melt was obtained.

[0055] Preferably, the mixed raw materials are first heated to 1400°C-1600°C to melt the raw materials, and then heated to 1500°C-1700°C and kept for 2h-10h to clarify and homogenize the melt. Among them, the...

Embodiment

[0074] Weigh and mix raw materials according to the following components and mass ratio: 52% SiO 2 , 21% Al 2 o 3 , 8.5% Na 2 O, 0.5% K 2 O, 2% MgO, 0.5% CaO, 6% Li 2 O, 1% ZnO, 0.5% BaO, 0.5% Fe 2 o 3 , 1.5% TiO 2 , 5% P 2 o 5 , 0.5% ZrO 2 , 0.1% Sb 2 o 3 and 0.4% As 2 o 3 . Pour the mixed raw materials into a melting furnace, gradually heat to 1600°C to melt the raw materials, and then continue to heat to 1650°C for 8 hours to clarify and homogenize the melt to obtain the melt. The molten material is placed in a mold for cooling and molding to obtain a semi-finished product.

[0075] The semi-finished product is then put into a crystallization furnace for heat treatment. Firstly, the crystallization furnace was heated to 750°C at a certain heating rate, and kept for 3 hours; then, the crystallization furnace was heated to 850°C at a certain heating rate, kept for 2 hours, cooled to a suitable temperature, taken out, and the prepared The material is placed in...

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Abstract

The invention discloses lithium aluminosilicate nanocrystalline transparent ceramic. The lithium aluminosilicate nanocrystalline transparent ceramic comprises a glass phase and a crystalline phase mixed in the glass phase, the lithium aluminosilicate nanocrystalline transparent ceramic is prepared from components in percentage by mass as follows: 40%-75% of silicon dioxide, 5%-35% of aluminum oxide, 2%-20% of sodium oxide, 2%-20% of lithium oxide and 1%-10% of titanium dioxide. The invention further provides a preparation method of the lithium aluminosilicate nanocrystalline transparent ceramic and a product comprising the lithium aluminosilicate nanocrystalline transparent ceramic.

Description

technical field [0001] The present application relates to the field of chemical industry, in particular to a lithium aluminum silicate nanocrystalline transparent ceramic, its preparation method and products. Background technique [0002] At present, with the vigorous development of high-tech such as 5G communication, wireless charging and flexible OLED curved screen, people have higher requirements for the appearance and performance of 3C smart products such as mobile phones and tablet computers. In terms of material application, traditional metal materials can cause shielding or interference to signal transmission; plastic materials have poor characteristics, and it is difficult to meet people's requirements for the appearance of mid-to-high-end mobile phones, so inorganic non-metallic transparent materials have become the mainstream material for display covers , such as glass and ceramics. However, ceramics are expensive and difficult to process. At present, aluminosilic...

Claims

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Application Information

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IPC IPC(8): C03C10/02C03C10/04C03C10/12C03C10/14C03B32/02
CPCC03C10/00C03C10/0027C03C10/0009C03B32/02
Inventor 姚全星罗恺袁晓波刘庆李军旗
Owner SHENZHEN JINGJIANG YUNCHUANG TECH CO LTD
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