Process for the continuous production of high purity, ultra-fine

Details Process for the continuous production of high purity, ultra-fine Process for the continuous production of high purity, ultra-fine

1990-04-25

1992-10-13

Langel, Wayne A.

Chemistry of inorganic compounds

Nitrogen or compound thereof

Binary compound

C01B 21072

Patent

active

051549077

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.

REFERENCES:
patent: 987408 (1911-03-01), Serpek
patent: 1188770 (1916-06-01), Hershman
patent: 1268240 (1918-06-01), Greulich et al.
patent: 3032398 (1962-05-01), Clair
patent: 3304249 (1967-02-01), Katz
patent: 3307908 (1967-03-01), Mandorf
patent: 3334974 (1967-08-01), Fletcher et al.

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