Preparation of Larnthanum β-Alumina with High Surface Area by Coprecipitation |
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| Authors: | Akira Kato Hisao Yamashita Hiroshi Kawagoshi Shimpei Matsuda |
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| Affiliation: | Hitachi Research Laboratory, Hitachi Ltd., Hitachi, Ibaraki, 319-12, Japan |
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| Abstract: | Mixtures of La2O3 and Al2O3 with various La contents were prepared by co-precipitation from La(NO3)3 and Al(NO3)3 solutions and calcined at 800° to 1400°C. The addition of small amounts of La2O3 (2 to 10 mol%) to Al2O3 gives rise to the formation of lanthanum β-alumina (La 2 O3·11–14Al2O3) upon heating to above 1000°C and retards the transformation of γ-Al2O3 to α-Al2O3 and associated sintering. |
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