Characterization and sintering of reactive cerium(IV) oxide powders prepared by the hydrazine method
- Doshisha Univ., Tanabe, Kyoto (Japan). Dept. of Molecular Science and Technology
Nanocrystalline cerium(IV) oxide (CeO{sub 2}) powders have been prepared by adding hydrazine monohydrate to an aqueous solution of hydrous cerium nitrate (Ce(NO{sub 3}){sub 3}{center_dot}6H{sub 2}O), followed by washing and drying. The lattice parameter of the as-prepared powder is a = 0.5415 nm. The powder characteristics and sinterability of reactive CeO{sub 2} have been studied. The surface areas of powders that have been heated at low temperatures are high, and these surface areas do not decrease to 10 m{sup 2}/g until the temperature is > 1,200 C. Crystallite size and particle size are strongly dependent on the heating temperature. Optimum sintered densities are obtained by calcining in the temperature range of 700--800 C. Ceramics with almost-full density can be fabricated at a temperature as low as 1,150 C.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 605768
- Journal Information:
- Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 12 Vol. 80; ISSN 0002-7820; ISSN JACTAW
- Country of Publication:
- United States
- Language:
- English
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