Emulsion-char method for making fine powder

Details Emulsion-char method for making fine powder Emulsion-char method for making fine powder

1985-06-17

1987-03-31

Silbaugh, Jan

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

264 291, 264 296, 423592, 423593, 423598, C01B 3100

Patent

active

046540750

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.

REFERENCES:
patent: 3250832 (1966-05-01), Metz
patent: 3330697 (1963-08-01), Pechini
patent: 3647364 (1972-03-01), Mazdiyasni et al.
patent: 4081857 (1978-03-01), Hanold, III
patent: 4293514 (1981-10-01), Wada

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