Double-metal-coated metal sulfide powder and process of producin

Details Double-metal-coated metal sulfide powder and process of producin Double-metal-coated metal sulfide powder and process of producin

1978-11-28

1981-01-06

Silverberg, Sam

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite powder

427217, 427214, 428403, 252 12, 252 26, B22F 0000

Patent

active

042437288

ABSTRACT:
A double-metal-coated metal sulfide powder comprises particles of a metal sulfide, a layer of a platinum group metal coating formed thereon, and an outer coating layer of a metal or alloy which contains at least one of iron, copper, nickel, and cobalt. The powder is obtained by forming a platinum group metal layer on metal sulfide particles by thermal decomposition of a plating composition which includes at least one platinum-metal compound containing a radical selected from the class consisting of NO, NO.sub.2, NO.sub.3, and NOCl and then forming a layer of at least one metal selected from the group consisting of iron, copper, nickel, and cobalt by the cementation reaction.

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