发明申请
US20080075653A1 Cobalt-Contaning Black Pigment Particulates 失效
钴黑色颜料颗粒

Cobalt-Contaning Black Pigment Particulates
摘要:
Disclosed is a black pigment having adequate degree of blackness and high electrical resistance at the same time. Specifically disclosed is a granular black pigment containing cobalt which is characterized in that it is composed of an oxide containing at least cobalt and the divalent cobalt content accounts for 40-70% of the total cobalt content. It is preferable that the total cobalt content in a whole particle is 60-80% by mass, and the divalent cobalt content in a whole particle is 20-50% by mass. It is also preferable that the primary particle diameter is 0.02-0.6 μm.
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