Manufacturing method for ceramics and products thereof
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United States of America Patent
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Jun 11, 1991
Issued Date -
N/A
app pub date -
Aug 26, 1988
filing date -
Sep 11, 1987
priority date (Note) -
Expired
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Abstract
An extremely pure oxide containing two or more metals, homogeneous at the atomic level, is prepared by (1) reacting in water, soluble salts of two or more metals with quaternary ammonium carbonate; the metals being those that form water-insoluble carbonates, thereby to precipitate mixed carbonates of the metals; (2) recovering and drying the precipitate; (3) calcining the precipitate to provide an oxide of mixed metals homogeneous at the atomic level and substantially free from extraneous contaminants. The calcined oxide can be shaped and compressed as greenware and sintered to form useful ceramic products.
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