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Title:
BLACK MAGNETIC IRON OXIDE PARTICLE POWDER AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2015/005452
Kind Code:
A1
Abstract:
The present invention pertains to a black magnetic iron oxide particle powder comprising a magnetite particle powder which is octahedral in shape, has silicon evenly distributed throughout the particle interior, and exhibits excellent blackness even when the applied coat thereof is thin. When producing a magnetic toner by using the black magnetic iron oxide particle powder in the present invention, it is possible to obtain a magnetic toner which exhibits excellent blackness. The black magnetic iron oxide particle powder is characterized by: being octahedral in shape; containing silicon in the amount of 0.19-1.90 at% calculated on a silicon element basis in relation to iron; and the silicon element solubility (Y), when the iron element solubility (X) is in the ranges of 20

Inventors:
IWAI RYO (JP)
SHIMO NOBUYA (JP)
UCHIDA NAOKI (JP)
Application Number:
PCT/JP2014/068500
Publication Date:
January 15, 2015
Filing Date:
July 10, 2014
Export Citation:
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Assignee:
TODA KOGYO CORP (JP)
International Classes:
C01G49/08; C09C1/24; G03G9/083
Domestic Patent References:
WO2010010752A12010-01-28
Foreign References:
JP2011213548A2011-10-27
JP2000327337A2000-11-28
JP2008230960A2008-10-02
JP2010030790A2010-02-12
JP2005289671A2005-10-20
Attorney, Agent or Firm:
OKADA, KAZUHIKO (JP)
Kazuhiko Okada (JP)
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