H - Electricity – 01 – M
Patent
H - Electricity
01
M
18/1120, 25/132,
H01M 2/14 (2006.01) H01M 6/18 (2006.01)
Patent
CA 1054674
ABSTRACT OF THE DISCLOSURE A method for preparing dense, ceramic polycrystalline bi- or multi-metal oxide bodies comprising: (A) disposing the bi- or multi-metal oxide in powder form within a hot pressing means adapted to simultaneously apply heat and pressure to said powder and spacing said powder from the pressure applying surfaces of said hot pressing means by interposing between said surfaces of said powder spacers formed of densified polycrystalline bi- or multi-metal oxide of the same composition as said powder; and (B) heating said powder within said hot pressing means to a temperature of at least 1250°C and applying a pressure of between about 3000 psi and about 10,000 psi for greater than about one (1) minute while maintaining said temperature. The method of the invention is particularly suited for the preparation of polycrystalline .beta."-alumina containing bodies exhibiting near theoretical density, low porosity, high strength and low electrical resistance. Such polycrystalline .beta."-alumina containing bodies are ideally suited for use as reaction zone separators or solid electrolytes in certain electrical conversion devices.
244731
Gordon Ronald S.
Tennenhouse Gerald J.
Virkar Anil V.
Ford Motor Company Of Canada
University Of Utah
LandOfFree
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