US 12,084,354 B2
Calcium titanate powder, method for producing same and external toner additive for electrophotography
Toshimasa Seki, Yamaguchi (JP); Takayasu Tanaka, Yamaguchi (JP); Wataru Mino, Yamaguchi (JP); Toshiyuki Koga, Yamaguchi (JP); and Tomoko Yoshimi, Yamaguchi (JP)
Assigned to TITAN KOGYO KABUSHIKI KAISHA, Ube (JP)
Appl. No. 17/260,895
Filed by TITAN KOGYO KABUSHIKI KAISHA, Ube (JP)
PCT Filed Jul. 11, 2019, PCT No. PCT/JP2019/027430
§ 371(c)(1), (2) Date Jan. 15, 2021,
PCT Pub. No. WO2020/017419, PCT Pub. Date Jan. 23, 2020.
Claims priority of application No. 2018-133928 (JP), filed on Jul. 17, 2018.
Prior Publication US 2021/0292182 A1, Sep. 23, 2021
Int. Cl. C01G 23/04 (2006.01); C01G 23/00 (2006.01); G03G 9/09 (2006.01)
CPC C01G 23/04 (2013.01) [C01G 23/006 (2013.01); G03G 9/0902 (2013.01); C01P 2002/34 (2013.01); C01P 2006/64 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A powder composed of particles, the particles comprising calcium titanate having a perovskite-type crystal structure as a main component, wherein a shape of primary particles is substantially spherical, and an average particle size of the primary particles is in a range of 20 nm or more and 100 nm or less, wherein
a molar ratio of calcium to titanium in the particles is in a range of 0.50 or more and 0.80 or less,
the particles comprise carbon (C) in a range of 10.0 g/kg or more and 50.0 g/kg or less, and
the particles comprise carbon (C) derived from monosaccharide and/or disaccharide.