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Magnesium aluminosilicate nanocrystalline transparent ceramic and preparation method and product thereof

A magnesium aluminum silicate and transparent ceramic technology, which is applied in the chemical industry, can solve the problems of difficult processing, poor plastic material properties, and high ceramic cost, and achieve the effect of improving mechanical strength, strength, fracture toughness, and performance

Inactive 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 cover is widely used, but ordinary glass is fragile and not resistant to falling.

Method used

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  • Magnesium aluminosilicate nanocrystalline transparent ceramic and preparation method and product thereof
  • Magnesium aluminosilicate nanocrystalline transparent ceramic and preparation method and product thereof
  • Magnesium 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 magnesium 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%.

[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 molten raw materials . Among them, the clarification is to remove the gas and impurities generated during the h...

Embodiment 1

[0078] Weigh and mix raw materials according to the following components and mass ratio: 52% SiO 2 , 18% Al 2 o 3 , 12.5% ​​Na 2 O, 2% K 2 O, 8% MgO, 1% CaO, 6% TiO 2 , 0.3% ZrO 2 , 0.1% P 2 o 5 and 0.1% Sb 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.

[0079] The semi-finished product is then put into a crystallization furnace for heat treatment. Firstly, heat the crystallization furnace to 820°C at a certain heating rate and keep it for 4 hours; then heat the crystallization furnace at a certain heating rate to 950°C and keep it for 2 hours, take it out after cooling to a suitable temperature, and use the prepared The material is placed in a molten salt for ion exchange for strengthening treatment ...

Embodiment 2

[0081] Weigh and mix raw materials according to the following components and mass ratio: 52% SiO 2 , 18% Al 2 o 3 , 12% Na 2 O, 2.5% K 2 O, 7.5% MgO, 0.8% CaO, 0.5% Li 2 O, 0.3% ZnO, 0.1% Fe 2 o 3 , 5.5% TiO 2 , 0.5% ZrO 2 , 0.1% P 2 o 5 and 0.2% Sb 2 o 3 . Pour the mixed raw materials into the 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.

[0082] The semi-finished product is then put into a crystallization furnace for heat treatment. Firstly, the crystallization furnace was heated to 800°C at a certain heating rate, and kept for 4 hours; then, the crystallization furnace was heated to 880°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 a molten salt for ...

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Abstract

The invention discloses magnesium aluminosilicate nanocrystalline transparent ceramic. The magnesium aluminosilicate nanocrystalline transparent ceramic comprises a glass phase and a crystalline phasemixed in the glass phase, the magnesium aluminosilicate nanocrystalline transparent ceramic is prepared from the following components in percentage by mass: 40 percent to 75 percent of silicon dioxide, 5 percent to 35 percent of aluminum oxide, 2 percent to 20 percent of magnesium oxide, 2 percent to 15 percent of sodium oxide and 1 percent to 10 percent of titanium dioxide. The invention furtherprovides a preparation method of the magnesium aluminosilicate nanocrystalline transparent ceramic and a product comprising the magnesium aluminosilicate nanocrystalline transparent ceramic. According to the magnesium aluminosilicate nanocrystalline transparent ceramic, the crystalline phase and the component proportion are optimized so that the magnesium aluminosilicate nanocrystalline transparent ceramic has the advantages of high strength, high hardness, high impact resistance and the like.

Description

technical field [0001] The present application relates to the field of chemical industry, and in particular to a magnesium aluminum silicate nanocrystalline transparent ceramic, a preparation method and a product thereof. 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,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/02C03C10/08C03C10/04C03C10/00C03C10/10C03B32/02
CPCC03C10/00C03C10/0018C03C10/0045C03B32/02
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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