Title:
窒化ホウ素粉末、放熱シート及び放熱シートの製造方法
Document Type and Number:
Japanese Patent JP7291304
Kind Code:
B2
Abstract:
The boron nitride powder according to the present invention is a boron nitride powder, containing at least an aggregated boron nitride particle formed by an aggregation of hexagonal boron nitride primary particles, the boron nitride powder having a particle size distribution including at least a first maximum point (MAX1), a second maximum point (MAX2) at which a particle size is larger than at the first maximum point, and a third maximum point (MAX3) at which a particle size is larger than at the second maximum point, in which the particle size at the first maximum point is 0.4 pm or more and less than 10 pm, the particle size at the second maximum point is 10 pm or more and less than 40 pm, and the particle size at the third maximum point is 40 pm or more and 110 pm or less. The heat dissipation sheet according to the present invention is obtained by molding a heat conductive resin composition containing the boron nitride powder according to the present invention and a resin. The method for producing a heat dissipation sheet according to the present invention includes a step of blending the boron nitride powder according to the present invention and a resin to prepare a heat conductive resin composition, a step of molding the heat conductive resin composition into a sheet shape to prepare a heat conductive resin composition sheet, and a step of heating and pressurizing the heat conductive resin composition sheet under a vacuum. According to the present invention, a boron nitride powder for obtaining a heat dissipation sheet excellent in heat conductivity, the heat dissipation sheet excellent in heat conductivity, and a method for producing the heat dissipation sheet excellent in heat conductivity can be provided.
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Inventors:
Kosuke Wada
Kiyotaka Fuji
Kiyotaka Fuji
Application Number:
JP2022570166A
Publication Date:
June 14, 2023
Filing Date:
December 17, 2021
Export Citation:
Assignee:
Denka Company Limited
International Classes:
C01B21/064; C08J5/18; C08K3/38; C08L101/00; C09K5/14
Domestic Patent References:
| JP2020164365A | ||||
| JP2020169230A | ||||
| JP2018043899A | ||||
| JP2008189818A | ||||
| JP2018526496A | ||||
| JP2020138903A |
Foreign References:
| WO2020196643A1 | ||||
| WO2012046814A1 |
Attorney, Agent or Firm:
Masahiro Taguchi
Takashi Ito
Yasuyoshi Suzuki
Takashi Ito
Yasuyoshi Suzuki