Method of making highly sinterable lanthanum chromite powder [electronic resource].
- 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
- Restrictions on Access:
- Free-to-read Unrestricted online access
- 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
- Other Subject(s):
- Method Highly Sinterable Lanthanum Chromite Powder Highly Sinterable Powder Consisting Essentially Lacro Containing Weight 20 Weight Chromite Dopant Sr Mg Coating Chromate Dopant Sr Mg Forming Solution Dopant Heating Solutions Forming Combined Solution Desired Ratio Dopant Heating Reduce Solvent Forming Foamed Mass Vacuum Burning Organic Components Forming Charred Material Grinding Charred Material Heating Char 590 Degree 950 Inert Gas Containing 50 000 Ppm Provide Specific Surface Particles Adding Material Mixture Nitrate Dopant Form Slurry Grinding Particles Slurry 10 Freeze Spray Drying Slurry Provide Coating Nitrates Particles 11 Heating Coated Particles Convert Nitrate Coating Chromate Coating Provide Highly Sinterable Material Specific Surface Combined Solution Organic Components Specific Surface Specific Surface Gas Containing Consisting Essentially Inert Gas Coated Particles Lanthanum Chromite Spray Drying Organic Component Highly Sinterable Highly Sinterable Highly Sinterable Desired Ratio Combined Sol
- Published through SciTech Connect.
Singhal, Subhash C.; Richards, Von L.
- Funding Information:
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