Preparation of tetragonal ZrO2-12 mol% CeO2 and ZrO2-6 mol% YO1.5 solid solutions at reduced temperature by a simple aqueous solution route using citric acid as a complexant

Masato Kakihana, Shingo Kato, Masatomo Yashima, Masahiro Yoshimura

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38 Citations (Scopus)

Abstract

A simple aqueous solution technique utilizing citric acid as a complexant was applied to prepare tetragonal ZrO2-12 mol% CeO2 and ZrO2-6 mol% YO1.5 solid solution powders at relatively low temperatures, viz. 600-1000°C. Heating of a mixed solution of citric acid (CA), water (H2O) and Ce (or Y) ions in the molar ratio of [CA]/[H2O]/[Zr+Ce (or Y)]=12.5(17.5 in the case of Y):300:1 on a hot-plate set at 160-200°C produced a transparent "gel" without any precipitation, which after heat treatment at 200°C was converted to a precursor for Zr0.88Ce0.12O2 (or Zr0.94Y0.06O1.97). The formation of compositionally homogeneous tetragonal zirconia phases occurred during the heat treatment of the precursor at 600-1000°C in static air, which was confirmed by a combined analysis using XRD and Raman scattering techniques.

Original languageEnglish
Pages (from-to)125-130
Number of pages6
JournalJournal of Alloys and Compounds
Volume280
Issue number1-2
DOIs
Publication statusPublished - 1998 Oct 23
Externally publishedYes

Keywords

  • Ceria
  • Citric acid route
  • Zirconia

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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