Hydrothermal synthesis of cerium(IV) oxide
- Aichi Inst. of Tech., Toyota (Japan). Dept. of Applied Chemistry
CeO{sub 2} powders have been prepared from cerium(III) nitrate, cerium(IV) sulfate, and cerium(IV) ammonium sulfate under hydrothermal conditions at 120 to 200 C for 5 to 40 h. The effects of the starting cerium compounds, hydrothermal treatment temperature, and the concentration of the solutions on the crystal growth of CeO{sub 2} were investigated. CeO{sub 2} powders hydrothermally synthesized at 180 C for 5 h from cerium(IV) salts had very fine particle sizes (30 {angstrom}); on the other hand, the powder from the cerium(III) salt had a relatively coarse particle size (160 {angstrom}). Although the crystallite size of the powder synthesized from the cerium(IV) compounds depended on the treatment temperature, that from the cerium(III) compound was insensitive to the treatment temperature. The mechanisms for the growth of CeO{sub 2} particles under hydrothermal conditions are discussed.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 230751
- Journal Information:
- Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 3 Vol. 79; ISSN 0002-7820; ISSN JACTAW
- Country of Publication:
- United States
- Language:
- English
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