Emulsion-char method for making fine powder
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United States of America Patent
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-
Mar 31, 1987
Grant Date -
N/A
app pub date -
Jun 17, 1985
filing date -
Jun 17, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Water soluble precursors of ceramic compounds are emulsified in an organic fluid that is subsequently heated to remove the free water from the emulsion droplets and further heated in a partial oxygen atmosphere to form a char. The carbon in the char maintains the separation between the dried droplet-derived particles. This char may then be heated in air to oxidize and remove the carbon, to calcine the ceramic, and to controllably produce a fine powder of spherical particles having a narrow size distribution.
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