Patent ID: 8184035
Filing Date: 2012-05-22
Classification: B82Y,C01P,C08K,C09C,H01B,Y10T

Abstract:
1. An insulated ultrafine powder comprising electrically conductive ultrafine particles coated with an insulation coating, characterized in that the electrically conductive ultrafine particles are formed of a carbon material which is in the form of spherical particles having a diameter of 1 nm or more and 500 nm or less, fibers having a cross-sectional diameter of 1 nm or more and 500 nm or less, or plate-like particles having a thickness of 1 nm or more and 500 nm or less; the insulation coating is formed of an insulating metal oxide or a hydrate thereof; the thickness of the insulation coating is 0.3 nm or more, and when the electrically conductive ultrafine particles are in the form of spherical particles, the coating thickness is equal to or less than the diameter of the particles; when the electrically conductive ultrafine particles are in the form of fibers, the coating thickness is equal to or less than the cross-sectional diameter of the fibers; or when the electrically conductive ultrafine particles are in the form of plate-like particles, the coating thickness is equal to or less than the thickness of the plate-like particles; wherein the insulating metal oxide is an insulating metal oxide having a molecular polarization of 5 cm wherein the insulating metal oxide or a hydrate thereof is titanium dioxide, zirconium dioxide, ditantalum pentoxide, a solid solution of zirconium dioxide and silicon dioxide, silicon dioxide, dialuminum trioxide, or a hydrate of any of these metal oxides.