Premium
Hydrothermal Synthesis of Cerium(IV) Oxide
Author(s) -
Hirano Masanori,
Kato Etsuro
Publication year - 1996
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1996.tb07943.x
Subject(s) - cerium , hydrothermal circulation , cerium oxide , cerium nitrate , crystallite , inorganic chemistry , hydrothermal synthesis , materials science , sulfate , particle size , ammonium nitrate , nuclear chemistry , lanthanide , chemistry , oxide , chemical engineering , metallurgy , organic chemistry , ion , engineering
CeO 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 2 were investigated. CeO 2 powders hydrothermally synthesized at 180°C for 5 h from cerium(IV) salts had very fine particle sizes (30 Å); on the other hand, the powder from the cerium(III) salt had a relatively coarse particle size (160 Å). 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 2 particles under hydrothermal conditions are discussed.