Black alumina ceramic and preparation method thereof

A technology of black alumina and alumina porcelain, applied in fibrous fillers and other directions, can solve problems such as being unsuitable for industrial production, harmful to human body and environment, and flammable ethyl orthosilicate, achieving stable crystal phase and low cost , the effect of low melting temperature

Inactive Publication Date: 2021-03-26
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the melting temperature in the preparation process is high, the energy consumption is large, and the raw material contains Cr 2 o 3 , harmful to the human body and the environment; patent CN110790577A discloses a preparation method of black alumina granulation powder, which uses a spray granulation process, and the investment cost is relatively high, and the spray drying belongs to the convection type dryer, and the thermal efficiency is relatively low , not suitable for industrial production; patent CN110723997A discloses a CuAl 2 o 4 A method for preparing black alumina ceramics as a main colorant, wherein tetraethyl orthosilicate is used as the introduction of SiO 2 However, ethyl orthosilicate is flammable, irritating, narcotic at high concentrations, and prone to danger in the production process; patent CN109111760A discloses a colorant for black alumina ceramics and its preparation method. Method Mix the raw materials and dissolve them in hydrochloric acid / sulfuric acid / nitric acid, and then use ammonia water / sodium hydroxide to precipitate to obtain the colorant
Strong acid and strong alkali are used in this process, which is dangerous to a certain extent and also has great damage to the environment.

Method used

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  • Black alumina ceramic and preparation method thereof
  • Black alumina ceramic and preparation method thereof
  • Black alumina ceramic and preparation method thereof

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preparation example Construction

[0024] The invention provides a kind of preparation method of black alumina ceramics, specifically comprises the following steps:

[0025]1) According to the mass fraction, 4-6% of diboron trioxide, 13-15% of silicon dioxide, 55-59% of bismuth trioxide, 0.5-2% of manganese dioxide, 16-19% of oxide Copper, 0.8-1.5% of ditungsten trioxide, 1-1.5% of antimony trioxide and 0.8-2% of germanium dioxide are uniformly mixed to obtain a mixture;

[0026] 2) Add the mixture into the preheated bisque crucible in the silicon carbon rod resistance furnace. The preheating temperature of the crucible is 800-900°C, and cover it; then raise the temperature to 950-1100°C, and keep it warm for 20-30 minutes. Pour the molten liquid into distilled water at room temperature for water quenching;

[0027] 3) fish out the water-quenched material, and dry to obtain black pellets;

[0028] 4) Weigh 43-55% black granules, 1-5% calcined kaolin, 0.5-1% titanium dioxide, and 43-55% distilled water accordi...

Embodiment 1

[0035] 1) Take 5.4% diboron trioxide, 14.7% silicon dioxide, 56.5% bismuth trioxide, 1% manganese dioxide, 17.9% copper oxide, 1.4% ditungsten trioxide, 1.8% of antimony trioxide and 1.3% of germanium dioxide are uniformly mixed to obtain a mixture;

[0036] 2) Add the mixture into the preheated bisque crucible in the silicon carbon rod resistance furnace. The preheating temperature of the crucible is 850°C, and cover it; then raise the temperature to 1000°C, keep it warm for 30 minutes, and pour the molten liquid into it Water quenching in distilled water at room temperature;

[0037] 3) fish out the water-quenched material, and dry to obtain black pellets;

[0038] 4) Weigh 48.2% black granular material, 3.5% calcined kaolin, 0.7% titanium dioxide and 47.6% distilled water according to the mass fraction, put them into a ball mill jar and mill for 12 hours, pass through a 300-mesh standard sieve to obtain black slurry ;

[0039] 5) Dip the cleaned 99% alumina porcelain int...

Embodiment 2

[0044] 1) Take 4.9% diboron trioxide, 14.5% silicon dioxide, 58.4% bismuth trioxide, 2% manganese dioxide, 17.6% copper oxide, 1.5% ditungsten trioxide, 1% antimony trioxide and 1.3% germanium dioxide are uniformly mixed to obtain a mixture;

[0045] 2) Add the mixture into the preheated bisque crucible in the silicon carbon rod resistance furnace. The preheating temperature of the crucible is 830°C, and cover it; then raise the temperature to 1080°C, keep it warm for 25 minutes, and pour the molten liquid into it Water quenching in water at room temperature;

[0046] 3) fish out the water-quenched material, and dry to obtain black pellets;

[0047] 4) Weigh 46.2% black granular material, 3.2% calcined kaolin, 1% titanium dioxide and 49.6% distilled water according to the mass fraction, put them into a ball mill jar and mill for 18 hours, pass through a 300-mesh standard sieve to obtain a black slurry ;

[0048] 5) Dip the cleaned 99% alumina porcelain into the black slurry...

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Abstract

The invention discloses black alumina ceramic and a preparation method thereof. The preparation method comprises the steps: 1) taking, by mass, 4%-6% of diboron trioxide, 13%-15% of silicon dioxide, 55%-59% of bismuth trioxide, 0.5%-2% of manganese dioxide, 16%-19% of copper oxide, 0.8%-1.5% of tungsten trioxide, 1%-1.5% of antimony trioxide and 0.8%-2% of germanium dioxide, and mixing to obtain amixture, 2) heating and melting the mixture at 950-1100 DEG C, performing water quenching, and drying the water-quenched material to obtain black granules, 3) taking 43-55% by mass of black granules,1-5% by mass of calcined kaolin, 0.5-1% by mass of titanium dioxide and 43-55% by mass of distilled water, and carrying out ball milling to obtain black slurry, and 4) immersing the alumina ceramic in the black slurry, taking out, drying, heating at 830-850 DEG C, and cooling to obtain the black alumina ceramic.

Description

technical field [0001] The invention relates to the technical field of alumina ceramic preparation, in particular to a black alumina ceramic and a preparation method thereof. Background technique [0002] With the development of microelectronics technology, people's understanding of packaging has changed a lot. The cost of semiconductor integrated circuit packaging is also increasing year by year, and packaging has become the darling of the semiconductor industry. In foreign countries, packaging has formed an independent high-tech industry, with specialized packaging material manufacturers and companies, specialized packaging material development centers and packaging material CAD software. In contrast, the level of the domestic packaging industry is relatively backward, and there is still a lot of room for development. [0003] The requirements of microelectronic packaging for substrate materials are: (1) good thermal conductivity; (2) matching the linear expansion coeffi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/85C09C1/00
CPCC04B41/50C04B41/85C04B41/009C09C1/0009
Inventor 郭宏伟刘磊童强池龙兴刘帅李荣悦白赟张维祥
Owner SHAANXI UNIV OF SCI & TECH
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