Process for the continuous production of high purity, ultra-fine, aluminum nitride powder by the carbo-nitridization of alumina
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United States of America Patent
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Oct 13, 1992
Issued Date -
N/A
app pub date -
Apr 25, 1990
filing date -
Oct 15, 1986
priority date (Note) -
Expired
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Abstract
A process for the manufacture of high purity, ultra-fine aluminum nitride powder by the carbo-nitridization of alumina. Agglomerates uniform in both size, chemical composition and porosity are formed containing a stoichiometric mixture of alumina and carbon with the addition of a small amount of catalyst. The agglomerates are furnaced in a controlled manner in a well-mixed reaction vessel to achieve a uniform and consistent level of conversion. Milling of the as-reacted agglomerates under a controlled atmosphere will produce high purity, micron sized aluminum nitride powder.
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