The effects of temperature and composition on the thermal conductivities of [(ZrO 2) 1-x(CeO 2) x] 0.92(Y 2O 3) 0.08 (0 ≤ x ≤ 1) solid solutions

Fan Yang, Xiaofeng Zhao, Ping Xiao

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The thermal conductivities of [(ZrO 2) 1- x(CeO 2) x] 0.92(Y 2O 3) 0.08 (0 ≤ x ≤ 1) solid solutions are studied in this paper. The incorporation of ZrO 2 and CeO 2 in the solid solution decreases the thermal conductivity compared with their end members (YSZ and YDC). The thermal conductivities of the solid solutions show clearly different temperature dependences in the ZrO 2-rich (0 ≤ x ≤ 0.5) region and in the CeO 2-rich region (0.5 ≤ x ≤ 1). The composition and the temperature dependence of the thermal conductivities are discussed based on established phonon scattering theories. We have concluded that the composition dependence of the thermal conductivity of this system is mainly controlled by the mass difference between Zr 4+ and Ce 4+, while the thermal conductivity-temperature relationship is dominated by the randomness of the defect distribution. © 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
    Original languageEnglish
    Pages (from-to)914-922
    Number of pages8
    JournalActa Materialia
    Volume60
    Issue number3
    DOIs
    Publication statusPublished - Feb 2012

    Keywords

    • Defect distribution
    • Mass disorder
    • Oxygen vacancy
    • Thermal conductivity
    • ZrO 2-CeO 2-Y 2O 3 solid solutions

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