COMPOSITE BLACK OXIDE PARTICLE, METHOD FOR PRODUCING SAME, BLACK COATING MATERIAL AND BLACK MATRIX

摘要

A complex black oxide particle containing oxides of cobalt, copper, and manganese is disclosed. The molar ratio of copper to cobalt is 0.1 to 0.5 and the molar ratio of manganese to cobalt is 0.2 to 1.0. Another complex black oxide particle which further contains silicon is disclosed. The silicon content is 0.1 to 3% by mass based on the whole particle. Still another complex black oxide particle whose surface is coated with a layer of Al oxide is disclosed. The Al content in the layer on the surface of the particle is 0.05 to 3% by mass based on the whole particle.