Stabilized metal oxides
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United States of America Patent
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Jun 14, 1994
Grant Date -
N/A
app pub date -
Sep 17, 1992
filing date -
Oct 1, 1991
priority date (Note) -
Expired
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Abstract
A composition suitable for use in the manufacture of ceramics comprises particulate zirconia the particles of which are coated with a hydrous oxide of yttrium and a hydrous oxide of manganese, iron, cobalt, nickel, copper or zinc. Preferably the particles also have an inner coating of titania, zirconia, hafnia or alumina. Ceramics prepared from the particulate zirconia of the invention are resistant to degradation by water at temperatures above 100.degree. C.
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