John L Wiley

US Patent:

51107686, May 5, 1992

Filed:

Jan 28, 1991

Appl. No.:

7/647380

Inventors:

Richard B. Kaner - Beverly Hills CA
Philippe R. Bonneau - Los Angeles CA
Edward G. Gillan - Los Angeles CA
John B. Wiley - Walnut CA
Robert F. Jarvis - Los Angeles CA
Rande Treece - Los Angeles CA

International Classification:

C04B 3552
C04B 3558

US Classification:

501 1

Abstract:

A process for producing a refractory material having the form TB. sub. o, e. g. zirconium nitride (ZrN), includes a first step of mixing a first salt having the form TX. sub. n, e. g. zirconium tetrachloride (ZrCl. sub. 4) and a second salt having the form A. sub. m B, e. g. lithium nitride (Li. sub. 3 N) in a ratio of n/m in a container. The process also includes a second step of igniting the mixture of the first and second salts, e. g. ZrCl. sub. 4 and Li. sub. 3 N, whereby the refractory material, e. g. ZrN, is produced along with byproducts having forms nAX and (n/m-o)B, e. g. 4LiCl and (1/6)N. sub. 2, respectively. The process further includes a third step of separating the refractory material from the byproducts by solvent extraction. The stoichiometric ratio of the second salt to the first salt is n/m, e. g. 4/3. T is selected from the group consisting of transition metals, e. g.