Sintering of Ceria‐Doped Tetragonal Zirconia Crystallized in Organic Solvents, Water, and Air

Tsugio Sato, Kenji Dosaka, Toshiaki Yoshioka, Akitsugu Okuwaki, Kazuo Torii, Yoshiro Onodera

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

Amorphous CeO2–ZrO2 gels 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–ZrO2 powders 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–ZrO2 powders 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, even at 1500°C.

Original languageEnglish
Pages (from-to)552-556
Number of pages5
JournalJournal of the American Ceramic Society
Volume75
Issue number3
DOIs
Publication statusPublished - 1992 Mar

Keywords

  • agglomeration
  • alcohol
  • cerium
  • crystallization
  • zirconia‐tetragonal polycrystals (TZP)

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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