Process for producing ceramic raw materials

Details Process for producing ceramic raw materials Process for producing ceramic raw materials

1989-11-28

1993-01-12

Group, Karl

Chemistry of inorganic compounds

Silicon or compound thereof

Binary compound

423345, 423346, 423406, 423409, 423440, G01B 33025

Patent

active

051788470

ABSTRACT:
The invention relates to a process for the production of silicon ceramic whiskers and silicon ceramic powder from silicon fluoride and ammonia or a hydrocarbon, at an elevated temperature. According to the invention, the hydrocarbon or ammonia (4) is decomposed separately at a high temperature into reactive carbon or nitrogen and hydrogen, whereafter the carbon or nitrogen radical thus obtained is further in a gas phase contacted with reactive silicon formed therein from silicon difluoride, in order to deposit finely-divided silicon nitride or silicon carbide out from the gas phase.

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Riley, F. L., Progress in Nitrogen Ceramics, Nato ASI Series No. 65, 1983, pp. 121-124.
Mori, M. et al., Progress in Nitrogen Ceramics, Nato ASI Series No. 65, 1983, pp. 149-152.
Morgan, P. E. D., Production and Formaton of Si.sub.3 N.sub.4 from Percusor Materials, pp. 11-13, Franklin Institute Research Laboratores, 1974, Distributed by NTIS.
Yamada, T. et al., Proc. Int. Symp. Ceramic Components for Engine, Japan, 1983, pp. 333-342.
Okabe, Y. et al., J. Less-Common Metals, 1979, 68(1):pp. 29-41.
Fujita, S. et al., J. Appl. Physics, 1984, vol. 23, pp. L2688-L270.

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