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Preparation method of porous aluminum nitride ceramic material

A technology for aluminum nitride ceramics and raw materials, which is applied to ceramic products, other household appliances, household appliances, etc., can solve the problems of high cost and complicated preparation process of porous aluminum nitride ceramic materials, and achieve uniform pore size and short preparation period. , the effect of simple process

Active Publication Date: 2018-07-06
景德镇成恒新材料厂(有限合伙)
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Problems solved by technology

[0004] The present invention solves the problems of complex preparation process and high cost of existing porous aluminum nitride ceramic materials, and provides a preparation method of porous aluminum nitride ceramic materials

Method used

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  • Preparation method of porous aluminum nitride ceramic material
  • Preparation method of porous aluminum nitride ceramic material

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specific Embodiment approach 1

[0020] Embodiment 1: The preparation method of the porous aluminum nitride ceramic material described in this embodiment is completed according to the following steps:

[0021] 1. Calcining the aluminosilicate raw material at a temperature of 500°C to 900°C for 0.5h to 3h to obtain an active aluminosilicate raw material;

[0022] 2. At room temperature, ball mill and mix the active aluminosilicate raw material and carbon material for 12h to 36h to obtain a ball mill mixture;

[0023] The molar ratio of the active aluminosilicate raw material to the carbon material is 1:(6~24);

[0024] 3. Add the alkali metal hydroxide into the silica sol, and stir magnetically for 1 to 3 days to obtain the alkali excitation solution;

[0025] The mol ratio of described alkali metal hydroxide and silicon dioxide in the silica sol is 1:1;

[0026] 4. Mix the ball mill mixture with the alkali excitation solution, and mechanically stir and ultrasonically vibrate for 1 hour at room temperature t...

specific Embodiment approach 2

[0033] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the aluminosilicate raw material in step 1 is kaolin, clay or blast furnace slag. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0034] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the carbon material described in step 2 is carbon powder, chopped carbon fiber or carbon felt. Others are the same as in the first or second embodiment.

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Abstract

The invention provides a preparation method for a porous aluminum nitride ceramic material, relates to a preparation method for a ceramic material, and aims at solving the problems that an existing porous aluminum nitride ceramic material preparation technology is complex and high in cost. The method comprises the steps of 1 activated aluminosilicate raw material preparation; 2 ball-milling mixture preparation; 3 alkali activation solution preparation; 4 inorganic polymer batch mixture preparation; 5 bland material preparation; 6 high-temperature treatment, and then the preparation method for the porous aluminum nitride ceramic material is completed. The method is used for preparing the porous aluminum nitride ceramic material.

Description

technical field [0001] The present invention relates to a preparation method of a ceramic material. Background technique [0002] Aluminum nitride (AlN) is a new type of ceramic material with excellent comprehensive performance. It has excellent thermal conductivity, reliable electrical insulation, low dielectric constant and dielectric loss, non-toxic, and a thermal expansion coefficient that matches silicon. With a series of excellent properties, it is considered to be an ideal material for a new generation of high-density semiconductor substrates and electronic device packaging, and has received extensive attention from researchers at home and abroad. AIN ceramics and their ceramic composites have excellent performance, but the high cost limits their practical application. The reasons are mainly attributed to two aspects: 1) the high price of aluminum nitride raw material powder; 2) the high sintering cost of aluminum nitride ceramics . In order to obtain low-cost and h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/00C04B35/581
CPCC04B35/581C04B38/00C04B2235/96
Inventor 何培刚苑景坤贾德昌杨治华段小明王胜金周玉
Owner 景德镇成恒新材料厂(有限合伙)