Title:
SILICA POWDER AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/209768
Kind Code:
A1
Abstract:
In a silica powder according to the present invention, the number of metallic silicon particles per 10 g of silica powder is no higher than 30 particles, and the dielectric loss tangent is no higher than 0.004. A silica powder production method according the present invention comprises a heating step for heating a silica powder in the presence of chlorine. The present invention makes it possible to provide a silica powder having a low dielectric loss tangent and a low metallic silicon content, and a production method for such a silica powder.
Inventors:
SHIOTSUKI HIROYUKI (JP)
MINAMIKAWA TAKAAKI (JP)
MIYAZAKI KOJI (JP)
MINAMIKAWA TAKAAKI (JP)
MIYAZAKI KOJI (JP)
Application Number:
PCT/JP2022/010943
Publication Date:
October 06, 2022
Filing Date:
March 11, 2022
Export Citation:
Assignee:
DENKA COMPANY LTD (JP)
International Classes:
C01B33/18
Domestic Patent References:
| WO2007049811A1 | 2007-05-03 |
Foreign References:
| JPH0450132A | 1992-02-19 | |||
| JP2001261352A | 2001-09-26 | |||
| JPH0640713A | 1994-02-15 | |||
| JP2015036357A | 2015-02-23 | |||
| JP2007070159A | 2007-03-22 | |||
| JPH08290911A | 1996-11-05 |
Attorney, Agent or Firm:
TAGUCHI, Masahiro et al. (JP)
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