Metal/dielectrics nano-structure controlled materials.

Abstract

A new family of materials, nano-structure controlled(NANOCON) metals with very high resistivity of 1011Ωcm, has been developed. Nanocon metals compose with 95-99.5% metals and 0.5-5% dielectrics and have a porosity of less than 1%. Pure metal powders are coated with very thin dielectric films of an order of 10nm. Coated powders are hotpress-sintered to a final density. A newly developed rate controlled sintering technique has resulted in a unique microstructure: dielectrics completely fill out grainboundaries without allowing any direct contacts between metal grains.