Thermodynamic Stability of Metastable Tetragonal t’-Ce0.5Zr0.5O2Phase in the CeO2-ZrO2system

Shinya Otsuka-Yao-Matsuo, Takayuki Yao, Takahisa Omata

研究成果: Article査読

3 被引用数 (Scopus)

抄録

According to the XRD analysis and emf measurements employing a solid electrochemical cell, we have compared the thermodynamic stabilities of metastable t’-Ce0.5Zr0.5O2phase, ZrO2-based monoclinic and CeO2-based cubic phases (m+c) mixture, and ZrO2-based tetragonal and CeO2-based cubic phases (t+c) mixture. The present experiments have confirmed that the t’ phase is metastable at higher temperatures than 1373 K, and the stable state is (t+c) mixture. The t’ phase is metastable at lower temperatures than 1173 K, and the stable state is (m+c) mixture. These results are consistent with the equilibrium phase diagram of CeO2-ZrO2system. According to the emf measurements, it was found that the thermodynamic stability of the t’ phase lies between those of (t+c) and (m+c) at lower temperatures than 1173 K. It was concluded that the t’ phase is metastable, but its thermodynamic stability is close to those of (t+c) and (m+c).

本文言語English
ページ(範囲)157-164
ページ数8
ジャーナルHigh Temperature Materials and Processes
22
3-4
DOI
出版ステータスPublished - 2003
外部発表はい

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 物理化学および理論化学

フィンガープリント

「Thermodynamic Stability of Metastable Tetragonal t’-Ce<sub>0.5</sub>Zr<sub>0.5</sub>O<sub>2</sub>Phase in the CeO<sub>2</sub>-ZrO<sub>2</sub>system」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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