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Method of making highly sinterable lanthanum chromite powder [electronic resource].

Published:
Pittsburgh, Pa. : Westinghouse Electric Corporation, 1992.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Additional Creators:
Westinghouse Electric Corporation and United States. Department of Energy. Office of Scientific and Technical Information
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Summary:
A highly sinterable powder consisting essentially of LaCrO.sub.3, containing from 5 weight % to 20 weight % of a chromite of dopant Ca, Sr, Co, Ba, or Mg and a coating of a chromate of dopant Ca, Sr, Co, Ba, or Mg; is made by (1) forming a solution of La, Cr, and dopant; (2) heating their solutions; (3) forming a combined solution having a desired ratio of La, Cr, and dopant and heating to reduce solvent; (4) forming a foamed mass under vacuum; (5) burning off organic components and forming a charred material; (6) grinding the charred material; (7) heating the char at from 590.degree. C. to 950 C. in inert gas containing up to 50,000 ppm O.sub.2 to provide high specific surface area particles; (8) adding that material to a mixture of a nitrate of Cr and dopant to form a slurry; (9) grinding the particles in the slurry; (10) freeze or spray drying the slurry to provide a coating of nitrates on the particles; and (11) heating the coated particles to convert the nitrate coating to a chromate coating and provide a highly sinterable material having a high specific surface area of over 7 m.sup.2 /g.
Report Numbers:
E 1.99:us 5143751
us 5143751
Other Subject(s):
Note:
Published through SciTech Connect.
01/01/1992.
"us 5143751"
Singhal, Subhash C.; Richards, Von L.
Funding Information:
AC02-80ET17089
View MARC record | catkey: 14153824