DIELECTRIC CERAMIC MATERIAL AND PROCESS FOR PRODUCING COARSE PARTICLES OF PEROVSKITE-TYPE COMPOSITE OXIDE FOR USE THEREIN

摘要

Provided is a dielectric ceramic material which can be loaded in an amount of at least 30 vol% into the resin that constitutes a composite dielectric and which can heighten the permittivity of the composite dielectric without requiring the loading in a higher proportion than conventional dielectric ceramic materials. The dielectric ceramic material comprises coarse particles of a perovskite (ABO3)-type composite oxide which have an average particle diameter of 8-50 µm and a BET specific surface area of 0.3-1.0 m2/g and fine particles of a perovskite (ABO3)-type composite oxide which have an average particle diameter of 0.7-3 µm and a BET specific surface area of 0.6-3 m2/g.