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Alumina ceramics material and its preparation method

A technology of alumina ceramics and alumina, applied in the field of semiconductors, can solve the problems of poor high temperature resistance, low thermal conductivity and refractive index, etc., to improve optical performance, improve thermal conductivity and refractive index, and increase thermal conductivity and refractive index. rate effect

Inactive Publication Date: 2017-09-15
FUJIAN HUAQING ELECTRONICS MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide an alumina ceramic material and its preparation method. The technical problems to be solved are: poor high temperature resistance, low thermal conductivity and low refractive index, so it is necessary to solve these problems

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  • Alumina ceramics material and its preparation method

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Embodiment 1

[0026] Alumina ceramic materials, in parts by weight, are composed of 89 parts of base material alumina, 8 parts of calcium magnesium silicon, 2 parts of fluorescent powder and 1 part of rare earth. It is formed by hot-pressing sintering in a press furnace. When the hot-pressing furnace is hot-pressing sintering, its interior is filled with helium, and the air pressure is 210Mpa; the hot-pressing sintering temperature in the hot-pressing furnace is 1725°C; the calcium The magnesium silicon component is a mixture of magnesium oxide or talcum powder, silicon dioxide and calcium carbonate; the chemical formula of the phosphor is (Tb, Ce) 3 Al 5 o 12 .

[0027] The rare earth in this embodiment can reduce the iron content in the glass, so as to remove the green color in the material, increase the thermal conductivity and refractive index, make the material more resistant to high temperature, and prolong the service life; by filling helium and isolating oxygen, it can improve Th...

Embodiment 2

[0036] Alumina ceramic materials, in parts by weight, are composed of 80 parts of base material alumina, 15 parts of calcium magnesium silicon, 3 parts of fluorescent powder and 2 parts of rare earth. It is formed by hot-pressing sintering in a press furnace. When the hot-pressing furnace is hot-pressing sintering, its interior is filled with helium, and the air pressure is 210Mpa; the hot-pressing sintering temperature in the hot-pressing furnace is 1725°C; the calcium The magnesium silicon component is a mixture of magnesium oxide or talcum powder, silicon dioxide and calcium carbonate; the chemical formula of the phosphor is (Tb, Ce) 3 Al 5 o 12 .

[0037] The rare earth in this embodiment can reduce the iron content in the glass, so as to remove the green color in the material, increase the thermal conductivity and refractive index, make the material more resistant to high temperature, and prolong the service life; by filling helium and isolating oxygen, it can improve ...

Embodiment 3

[0046] Alumina ceramic materials, in parts by weight, are composed of 85 parts of base material alumina, 12 parts of calcium magnesium silicon, 2 parts of fluorescent powder and 1 part of rare earth. It is formed by hot-pressing sintering in a press furnace. When the hot-pressing furnace is hot-pressing sintering, its interior is filled with helium, and the air pressure is 220Mpa; the hot-pressing sintering temperature in the hot-pressing furnace is 1680°C; the calcium The magnesium silicon component is a mixture of magnesium oxide or talcum powder, silicon dioxide and calcium carbonate; the chemical formula of the phosphor is (Tb, Ce) 3 Al 5 o 12 .

[0047] The rare earth in this embodiment can reduce the iron content in the glass, so as to remove the green color in the material, increase the thermal conductivity and refractive index, make the material more resistant to high temperature, and prolong the service life; by filling helium and isolating oxygen, it can improve T...

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Abstract

The invention relates to an alumina ceramics material and its preparation method. The alumina ceramics material is prepared from, by weight, 80-89 parts of base stock aluminum oxide, 8-15 parts of calcium magnesium silicon component, 2-3 parts of fluorescent powder, and 1-2 parts of rare-earth. The alumina ceramics material is prepared by making a blank through a flow casting method and performing thermal pressing and sintering in a hot pressing furnace, wherein the calcium magnesium silicon component is mixture of magnesium oxide, talcum powder, silicon dioxide, and calcium carbonate. Compared with the prior art, the rare-earth can reduce the iron content in the glass so as to remove green in the material, increase heat conductivity and refractive index; thus the material can resist high temperature better and prolong the service life.

Description

technical field [0001] The invention relates to the technical field of semiconductors, and relates to an alumina ceramic material and a preparation method thereof. Background technique [0002] LED filament lamps have attracted wide attention due to their 360-degree full luminescence, no flicker, no heat, long life, and slow attenuation. LED luminescence relies on chips to excite phosphors to produce uniform illumination, especially the invention of nano-translucent ceramic filaments. Successful use not only reduces product costs, but also effectively solves related filament lamp technologies to achieve high "cost-effective" products. Many real 360-degree uniform luminescence requires an increase in the light transmittance of the material. Glass has good light transmittance, but it has a fatal flaw in that it has extremely poor thermal conductivity, and the thermal conductivity is only about 0.5. Sapphire has good light transmittance but The price is too high. Although nano...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/645
CPCC04B35/10C04B35/645C04B2235/3206C04B2235/3222C04B2235/3224C04B2235/3418C04B2235/349C04B2235/408C04B2235/442
Inventor 杨大胜施纯锡
Owner FUJIAN HUAQING ELECTRONICS MATERIAL TECH
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