INSULATED ULTRAFINE POWDER AND HIGH DIELECTRIC CONSTANT RESIN COMPOSITE MATERIAL

摘要

An insulated ultrafine powder comprising a conductive ultrafine powder furnished with an insulating coating film, characterized in that the conductive ultrafine powder is constituted of a carbon material being in the form of a sphere of 1 to 500 nm particle diameter, a fiber of 1 to 500 nm cross section diameter or a sheet of 1 to 500 nm thickness, and that the insulating coating film is constituted of an insulating metal oxide or hydrate thereof, and that the insulating coating film has a thickness of = 0.3 nm, which thickness when the conductive ultrafine powder is spherical, is = particle diameter thereof, and when the conductive ultrafine powder is fibrous, is = cross section diameter thereof, and when the conductive ultrafine powder is of sheet form, is = thickness thereof. Further, there is provided a high dielectric constant resin composite material comprising the insulated ultrafine powder. While retaining, inherent to the resin material, excellent moldability, workability and lightweightness, there can be realized high dielectric constant, further radiowave absorbing capacity.