| 摘要 |
The present invention relates to black complex oxide particles comprising a complex oxide, which comprises Fe, Mg and Al as metal components, wherein the amount of Fe ranges from 30 to 55% by mass, the ratio of Fe<3+> atoms to Fe<2+> atoms (Fe<3+>/Fe<2+>) ranges from 0.8 to 10, the amount of Mg ranges from 1 to 10% by mass and the amount of Al ranges from 1 to 10% by mass, for instance, a water-containing complex oxide represented by the following chemical compositional formula: Fe<2+>a Fe<3+>b MgcAld Oe . nH2 O as well as a method for the preparation thereof. The black complex oxide particles are suitably used as a black pigment for paints and varnishes, ink, toner particles, and rubber and plastic materials and have a low load applied to the environment and an excellent degree of blackness. <IMAGE> |
