Process for preparing ultrafine aluminum nitride powder

Details Process for preparing ultrafine aluminum nitride powder Process for preparing ultrafine aluminum nitride powder

1992-01-10

1993-06-15

Langel, Wayne

Compositions: ceramic

Ceramic compositions

Refractory

423412, 501 97, 501 98, C01B 21072, C04B 3558

Patent

active

052198049

ABSTRACT:
Rapidly heat powdered aluminum, an admixture of powdered aluminum and a compatible solid material, a powdered admixture of alumina and carbon, or aluminum nitride powder having a surface area lower than desired in the presence of a source of nitrogen at a temperature of 2473 to 3073K to produce aluminum nitride, then promptly quench the aluminum nitride product. The product has a surface area of greater than 10 m.sup.2 /g, preferably greater than 15 m.sup.2 /g.

REFERENCES:
patent: 4610857 (1986-09-01), Ogawa et al.
patent: 4612045 (1986-09-01), Shintaku
patent: 4812166 (1989-03-01), Saiki et al.
patent: 4877759 (1989-10-01), Holt et al.
patent: 5126121 (1992-06-01), Weimer et al.
Kazuhiro, et al. Synthesis and properties of ultrafine A1N powder by rf plasma Appl. Phys. Lett. 54(23), Jun. 5, 1989.
N. Hotta et al., Continuous Synthesis and Properties of Fine A1N Powder by Floating Nitridation Technique, Nippon Ceramics, 96[7], 731-35 (1988) date unavailable.

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