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Title:
ALUMINA POWDER, RESIN COMPOSITION, AND HEAT DISSIPATION COMPONENT
Document Type and Number:
WIPO Patent Application WO/2021/200490
Kind Code:
A1
Abstract:
The alumina powder of the present invention comprises first alumina particles having an average particle diameter of 0.1 μm or more and less than 1 μm, second alumina particles having an average particle diameter of 1 μm or more and less than 10 μm, and third alumina particles having an average particle diameter of 10-100 μm, wherein each of the average particle diameters are measured by a laser diffraction scattering type particle size distribution measurement device, the average sphericity of the first alumina particles with a projected area-equivalent circle diameter obtained by microscopy of 0.1-1 μｍ is 0.80-0.98, and the ratio D90/D10 of the first alumina particles is 2.0-8.0, with D10 being the particle diameter at a cumulative volume of 10%, from the smaller particle side, and D90 being the particle diameter at a cumulative volume of 90%, from the smaller particle side, in the volume-basis cumulative particle size distribution.

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Inventors:
KOMAKI TAKAFUMI (JP)
NITTA JUNYA (JP)
OKAMOTO YOSHIAKI (JP)
HIRATA MASAKAZU (JP)
KARINO GENTA (JP)
Application Number:
PCT/JP2021/012306
Publication Date:
October 07, 2021
Filing Date:
March 24, 2021
Export Citation:
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Assignee:
DENKA COMPANY LTD (JP)
International Classes:
C01F7/02; C08K3/22; C08L101/00; C09K5/14
Domestic Patent References:
WO2015056523A12015-04-23
WO2018235920A12018-12-27
WO2008053536A12008-05-08
Foreign References:
JP2012031402A2012-02-16
JPH08290914A1996-11-05
JP2009164093A2009-07-23
JP2009274929A2009-11-26
JPH06191835A1994-07-12
JPH07187663A1995-07-25
JPH08290914A1996-11-05
JP2020063263A2020-04-23
Other References:
See also references of EP 4129911A4
Attorney, Agent or Firm:
INABA, Yoshiyuki et al. (JP)
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