| 摘要 |
PROBLEM TO BE SOLVED: To obtain an inexpensive molding composite material having a plurality of functions by dispersing specified amounts of a plural types of different ceramic particles corresponding to a plurality of functions selected among dielectric properties, piezoelectric properties, magnetic properties, electroconductive properties and heat-conductive properties in a matrix comprising a plastic. SOLUTION: The ceramic particles to be dispersed are at least two types of ceramics corresponding to at least two different functions and is contained in an amount of 50-99 vol.% based on the composite material. The plastic used may be a thermosetting or thermoplastic one, and it is desirable that a thermoplastic resin is injection-molded. The ceramic which can be used is barium titanate or the like having dielectric properties, PZT or the like having piezoelectric properties, ferrite, electroconductive ZrB2 or the like, or beryllia, diamond or the like having heat conductivity. The ceramic particles desirably have an aspect ratio of 2 or below and a mean particle diameter of 1-50μm. It is desirable that they have been treated with a silane coupling agent.
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