Low-temperature sintered aluminum nitride ceramic material, aluminum nitride tape casting slurry and application

A low-temperature sintering technology for aluminum nitride ceramics, applied in the field of ceramic materials, can solve the problems of high sintering temperature of aluminum nitride ceramics, achieve good thermal conductivity, improve dispersion, reduce pores and glass phase effects

Active Publication Date: 2021-08-03
深圳市丁鼎陶瓷科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problem of high sintering temperature of aluminum nitride ceramics at present, this application provides a low-temperature sintered aluminum nitride ceramic material and aluminum nitride casting slurry and application

Method used

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  • Low-temperature sintered aluminum nitride ceramic material, aluminum nitride tape casting slurry and application
  • Low-temperature sintered aluminum nitride ceramic material, aluminum nitride tape casting slurry and application
  • Low-temperature sintered aluminum nitride ceramic material, aluminum nitride tape casting slurry and application

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0061] A low-temperature sintered aluminum nitride ceramic material prepared through the following steps:

[0062] Take 8 kg of micron-sized aluminum nitride ceramic powder with a median particle size D50 in the range of 2.2 μm and 2 kg of nano-sized aluminum nitride ceramic powder with a median particle size D50 in the range of 0.03 μm, and mix them to obtain aluminum nitride ceramic powder; Weigh 0.4kg of AlF at the same time 3 and 0.45kg of CaF 2 , to prepare a low-temperature sintered aluminum nitride ceramic material.

preparation example 2-8 and comparative preparation example 1

[0064] The difference between Preparation Examples 2-8 and Comparative Preparation Example 1 and the above Preparation Example 1 lies in the difference in the type and amount of materials, see Table 2 below for details;

[0065] Table 2 preparation examples 1-8 and comparative preparation example 1 material type, material consumption

[0066]

[0067]

Embodiment 1

[0070] A kind of aluminum nitride tape casting slurry is prepared through the following steps:

[0071] will diameter Zirconium balls, 1.1kg of absolute ethanol, 3.4kg of n-propyl acetate, 0.12kg of ammonium polyacrylate dispersant 5027 and 0.12kg of BYK-A530 defoamer were added to the barrel of the grinding equipment. 40%, stir until ammonium polyacrylate dispersant 5027 and BYK-A530 defoamer dissolve, then add 0.4kg of AlF 3 and 0.45kg of CaF 2 , ball milled to AlF at a speed of 1300rpm 3 and CaF 2 The median particle size D50 range of 0.3-0.5 μm, then add 10kg of the aluminum nitride ceramic powder of Preparation Example 1, continue ball milling at a speed of 1300rpm, and ball mill to the median particle size of the aluminum nitride ceramic powder After the D50 range is 0.8-1.2μm, stop the ball milling, add 0.75kg polyvinyl butyral and 0.75kg synthetic vegetable ester, stir evenly, ball mill for 40min at the speed of 1300rpm, discharge the material, and make it after v...

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Abstract

The invention relates to the field of ceramic materials, and particularly discloses a low-temperature sintered aluminum nitride ceramic material, aluminum nitride tape casting slurry and application. The aluminum nitride ceramic material comprises aluminum nitride ceramic powder, a sintering aid A and a sintering aid B, wherein the sintering aid A is one or a combination of more of AlF3, LiF and metal Li powder, and the sintering aid B is one or a combination of more of CaF2, YF3, Y2O3 and Dy2O3; the mass of the sintering aid A is 4-7% of the total mass of the aluminum nitride ceramic powder, and the dosage of the sintering aid B is 2.5-4.5% of the total mass of the aluminum nitride ceramic powder. The aluminum nitride tape casting slurry comprises an organic solvent, a dispersing agent, a defoaming agent, an adhesive, a plasticizer and the aluminum nitride ceramic material. According to the aluminum nitride ceramic product prepared from the aluminum nitride ceramic material, the sintering temperature is reduced to 1300-1450 DEG C, low-temperature sintering is achieved, and the prepared aluminum nitride ceramic product has excellent thermal properties.

Description

technical field [0001] The application relates to the field of ceramic materials, more specifically, it relates to a low-temperature sintered aluminum nitride ceramic material, aluminum nitride casting slurry and applications. Background technique [0002] Aluminum nitride ceramics have excellent thermal, mechanical, and electrical properties, high thermal conductivity, and high strength. They have become ideal heat dissipation and packaging materials for integrated circuits, semiconductor modules, and high-power devices. They can be widely used in HBLED, UVLED packaging, and high-power integration. Circuits, power modules, RF / microwave communications, automotive resistors, microelectronic semiconductors, image transmission and other fields. [0003] However, aluminum nitride (AlN) is a covalent compound with a small self-diffusion coefficient, so it is difficult to directly sinter and densify it. Therefore, the preparation of aluminum nitride ceramics usually requires the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/582C04B35/622C04B35/626C04B35/64
CPCC04B35/581C04B35/622C04B35/6261C04B35/62625C04B35/64C04B2235/3225C04B2235/3224C04B2235/445C04B2235/40C04B2235/5436C04B2235/5445C04B2235/5454C04B2235/656C04B2235/6567C04B2235/658C04B2235/6582C04B2235/6581
Inventor 丁涛
Owner 深圳市丁鼎陶瓷科技有限公司
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