| 摘要 |
PURPOSE:To obtain the title ceramic having high density by forming a coprecipitate contg. a part of metallic constituents except Zr constituting Sr(Ce, Zr)O3 type ceramic and contg. Zr independently, adding thereto residual constituents, and molding the mixture and sintering the molded product. CONSTITUTION:A soln. [e.g. mixture of aq. soln. of cerium (III) nitrate and zirconyl nitrate] contg. an appropriate amt. of at least one metallic constituent except Zr (e.g. Ce) constituting Sr(Ce, Zr)O3 type ceramic contg. Zr is prepd. Then, coprecipitate is formed by allowing the soln. to react with a precipitate- forming soln. (e.g. aq. ammonia). The coprecipitate is dried and calcined at 700-1,300 deg.C to obtain a powdery product having submicron level particle size and contg. scarcely agglomerates. The powdery product is mixed with a compd. of residual constituents of the Sr(Ce, Zr)O3 type ceramic, and the mixture is calcined at 500-1,300 deg.C. The title ceramic is obtained by sintering the calcined powder at 700-1,700 deg.C after molding the powder.
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