Crystallisation of ceria doped zirconia in liquid media at high temperatures

T. Sato, Y. Inoue, T. Odashima, M. Ishitsuka, E. Min

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

Amorphous 12CeO2-88ZrO2 (mol.-%) gels were heated in liquid media such as water, methanol, and n-hexane above 200°C. As initially prepared, the gels were amorphous, but after 5 h heating in methanol at 250°C, tetragonal zirconia was identified by X-ray analysis. An amorphous gel examined by differential thermal analysis on calcination in air showed crystallisation to the tetragonal form at 420°C. The crystallisation behaviour in liquid media could be adequately described by the surface chemical reaction controlled shrinking core model. Crystallisation in wafer was much faster than in methanol and n-hexane, but the sinterability of powder prepared in water was poorer than of that prepared in organic solvents. The addition of requisite amounts of water to organic solvents was found useful in promoting crystallisation of gel without loss of powder sinterability.

Original languageEnglish
Pages (from-to)99-102
Number of pages4
JournalBritish Ceramic Transactions
Volume95
Issue number3
Publication statusPublished - 1996 Dec 1

ASJC Scopus subject areas

  • Ceramics and Composites

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