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Electrically conductive microparticles characterized by high conductivity and low density are comprised of electrically nonconductive microballoons having an electrically conductive coating of a metal. When dispersed in an electrically nonconductive matrix, an electrically conductive composite mater

Electrically conductive microparticles characterized by high conductivity and low density are comprised of electrically nonconductive microballoons having an electrically conductive coating of a metal. When dispersed in an electrically nonconductive matrix, an electrically conductive composite material is formed in which the microparticles form a network of contacting particles throughout the matrix.

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A method of producing bright, mirror-like silver coated magnetic ceramic microballons comprising providing a quantity of microballons formed of a ceramic material comprising a magnetic material selected from the group consisting of iron, nickel, iron oxide, ferrite, and mixtures of these materials i

A method of producing bright, mirror-like silver coated magnetic ceramic microballons comprising providing a quantity of microballons formed of a ceramic material comprising a magnetic material selected from the group consisting of iron, nickel, iron oxide, ferrite, and mixtures of these materials imparting magnetic properties of the microballon, dispersing the microballons in a plating solution consisting essentially of (a) a silver salt; (b) a reducing sugar and (c) an organic chelating agent and chemically reducing the silver salt to form a bright, mirror-like silver coating on the surface of the ceramic magnetic microballons.