Metallic porous membrane and method of manufacture

Details Metallic porous membrane and method of manufacture Metallic porous membrane and method of manufacture

1993-04-28

1995-05-23

Walsh, Donald P.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Making porous product

419 53, 419 58, 264 65, 2105101, B01D 2400, B01D 3900, B22F 316

Patent

active

054179173

ABSTRACT:
A method for the preparation of an open cell porous metallic material is provided. The method includes first molding a metal oxide powder into a desired gas-permeable body, then firing the body to obtain a sintered body of metal oxide. Lastly, oxygen is removed from the sintered metal oxide by firing in a reducing atmosphere. In a preferred embodiment, metal oxides such as NiO are combined with polyvinyl alcohol (PVA) and compressed into a molded body which is then air-fired and reduced. Pore sizes of less than 1 .mu.m are characteristic. Porosity of up to 64 percent has been demonstrated for nickel. In another preferred embodiment, mixed systems of metal alloys are demonstrated. In particular, results are shown for a NiO--MoO.sub.3 system.

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