Sintering of Ceria‐Doped Tetragonal Zirconia Crystallized in Organic Solvents, Water, and Air
作者:
Tsugio Sato,
Kenji Dosaka,
Toshiaki Yoshioka,
Akitsugu Okuwaki,
Kazuo Torii,
Yoshiro Onodera,
期刊:
Journal of the American Ceramic Society
(WILEY Available online 1992)
卷期:
Volume 75,
issue 3
页码: 552-556
ISSN:0002-7820
年代: 1992
DOI:10.1111/j.1151-2916.1992.tb07841.x
出版商: Blackwell Publishing Ltd
关键词: zirconia‐tetragonal polycrystals (TZP);cerium;crystallization;alcohol;agglomeration
数据来源: WILEY
摘要:
Amorphous CeO2–ZrO2gels were prepared by coprecipitation in ammonia solutions. The onset of crystallization of the gels, from calcining in air, was 420°C, while 200° to 250°C in the presence of water and organic solvents such as methanol and ethanol. The sintering behaviors of CeO2–ZrO2powders were sensitive to the crystallizing conditions, since hard agglomerates formed when the precipitated gels were crystallized by normal calcination in air, whereas soft agglomerates formed when they were crystallized in water or organic solvents. CeO2–ZrO2powders crystallized in methanol and water at 250°C were sintered to full theoretical density at 1150° and 1400°C, respectively, whereas that crystallized by calcination in air at 450°C was sintered to only 95.2% of theoretical density, ev
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