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Spherical aluminum nitride powder and method for producing spherical aluminum nitride powder

A technology of aluminum nitride and spheroidization, applied in chemical instruments and methods, nitrogen compounds, inorganic chemistry, etc., can solve problems such as kneading performance and filling performance decline, particle surface area increase, particle size distribution can not be controlled, etc., to achieve promotion Effect of spheroidization and particle growth, improvement of filling properties

Active Publication Date: 2021-03-23
MARUWA
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, when using the flux method, there is a problem that when the flux is removed with a strong acid, the surface of the particles is damaged, the surface area of ​​the particles increases, and the kneading performance and filling performance drop sharply due to the uncontrollable particle size distribution of the particles

Method used

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  • Spherical aluminum nitride powder and method for producing spherical aluminum nitride powder
  • Spherical aluminum nitride powder and method for producing spherical aluminum nitride powder
  • Spherical aluminum nitride powder and method for producing spherical aluminum nitride powder

Examples

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Embodiment

[0058] In the following, the present invention is described more specifically based on Examples and Comparative Examples, but the present invention should not be construed as being limited by these Examples.

[0059] The spherical aluminum nitride powders according to Examples 1-21 and Comparative Examples 1-5 were prepared by performing the following steps.

[0060] First, a predetermined amount of aluminum nitride raw material powder is prepared. A powder having an average particle diameter of 0.9-2.7 μm is used as the aluminum nitride raw material powder. Prepare high-purity powders of rare earth compounds and calcium compounds as additive powders. As the carbon powder, a powder having an average particle diameter of 10 to 50 nm and an ash content of 0.1% or less is used. Predetermined weight percentages of rare earth compound powder, calcium compound powder, and carbon powder were mixed into 100% by weight of aluminum nitride raw material powder. The mixing ratios of ra...

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Abstract

Provided is a spherical aluminum nitride powder having a particle shape that is closer to sphericity. The spherical aluminum nitride powder according to the present invention, which contains a main component comprising AlN and a side component comprising a rare earth compound, is characterized in that at least 70% of particles in the powder have an outer peripheral shape having neither an angularedge part nor an uneven part in the plane projection image of individual particles.

Description

technical field [0001] The invention relates to a spherical aluminum nitride powder and a preparation method thereof. Background technique [0002] In recent years, aluminum nitride has been recognized as a ceramic material with excellent thermal conductivity, and its sintered substrate has been widely used in electronic equipment and the like that require high heat dissipation performance. In addition, aluminum nitride powder is also used as a filler that will be mixed into materials such as greases, adhesives and coatings to take advantage of its excellent thermal conductivity. Expected material properties of fillers include, for example, filling properties, kneading properties, and thermal conductivity. Taking advantage of the better filling properties of fillers, powders can be mixed into materials such as resins at higher concentrations. Taking advantage of the better kneading properties of the filler, the filler can be more easily mixed with the material at higher co...

Claims

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Application Information

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IPC IPC(8): C01B21/072C04B35/581C04B35/628
CPCC01B21/0728C01P2004/03C01P2004/32C01P2004/51C01B21/072C04B35/581
Inventor 伊藤冬树加藤大亮高桥光隆
Owner MARUWA
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