Coprecipitation and hydrothermal synthesis of ultrafine 5.5 mol% CeO{sub 2}-2 mol% YO{sub 1.5}-ZrO{sub 2} powders

Journal Article · Tue Dec 31 23:00:00 EST 1996 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1997.tb02795.x· OSTI ID:455159

Lin, J D; Duh, J G ^[1]

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1. National Tsing Hua Univ., Hsinchu (Taiwan, Province of China). Dept. of Materials Science and Engineering

Ultrafine 5.5 mol% CeO{sub 2}-2 mol% YO{sub 1.5}-ZrO{sub 2} powders with controllable crystallite size were synthesized by two kinds of coprecipitation methods and subsequent crystallization treatment. The amorphous gel produced by ammonia coprecipitation and hydrothermal treatment at 200 C for 3.5 h results in an ultrafine powder with a surface area of 206 m{sup 2}/g and a crystallite size of 4.8 nm. The powder produced by urea hydrolysis and calcination exhibits a purely tetragonal phase. In addition, the powders crystallized by hydrothermal treatment exhibit high packing density and can be sintered at lower temperature (<1,400 C) with nearly 100% tetragonal phase achieved.

• Sponsoring Organization: USDOE
• OSTI ID: 455159
• Journal Information: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 1 Vol. 80; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AMMONIA
CERIUM OXIDES
COPRECIPITATION
CRYSTALLIZATION
PARTICLE SIZE
PHASE STUDIES
SYNTHESIS
UREA
YTTRIUM OXIDES
ZIRCONIUM OXIDES