Densification, microstructure and grain growth in the CeO2-Fe2O3system (0 ≤ Fe/Ce ≤ 20%)

Tianshu Zhang, Peter Hing, Haitao Huang, J. Kilner

Research output: Journal article publicationJournal articleAcademic researchpeer-review

58 Citations (Scopus)

Abstract

Mixtures of CeO2and Fe2O3with Fe/Ce atomic ratios ranging from 0 to 0.2 were prepared by the conventional mixed-oxide technique. Small amount of Fe doping (Fe/Ce≤1%) significantly promotes the densification and grain growth of CeO2ceramic. The results from the dilatometric measurement and SEM (scanning electronic microscopy) observation reveal that 0.5% Fe doping reduces the sintering temperatures by at least 200°C. For the samples with a large amount of Fe2O3(Fe/Ce ≥ 1%), however, above 1400°C the densification behavior deteriorates remarkably; the density decreases with increasing sintering temperatures due to appearance of a lot of microcracks along grain boundaries. The so-called pining effect of second phase starts to take effect in the samples with Fe content greater than 5%. Fe2O3grains grow more quickly at a lower sintering temperature (≤ 1050°C), compared with those of CeO2.
Original languageEnglish
Pages (from-to)2221-2228
Number of pages8
JournalJournal of the European Ceramic Society
Volume21
Issue number12
DOIs
Publication statusPublished - 1 Oct 2001
Externally publishedYes

Keywords

  • CeO -Fe O 2 2 3
  • Composites
  • Grain growth
  • Microstructure-final
  • Sintering

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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