Thermophysical properties of Sm2(Zr1-x Ce x )2O7 ceramics

Hongsong Zhang*, Kun Sun, Qiang Xu, Fuchi Wang, Ling Liu, Yuan Wei, Xiaoge Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

Sm2(Zr1-x Ce x )2O7 (x = 0.1, 0.2, and 0.3) ceramics were prepared by solid reaction method at 1600°C for 10 h using Sm2O3, ZrO2, and CeO2 as starting reactants. The phase compositions, microstructures, thermal expansion coefficients, and partial thermal conductivities of these materials were investigated. X-ray diffraction (XRD) results reveal that Sm 2(Zr0.9Ce0.1)2O7 with pyrochlore structure and Sm2(Zr1-x Ce x ) 2O7 (x = 0.2 and 0.3) with fluorite structure were synthesized, and scanning electrical microscopy (SEM) images show that the microstructures of these products are very dense. The linear thermal expansion coefficients increase with increasing temperature in the temperature range from ambient to 1200°C, and the thermal expansion coefficients increase with increasing content of doped CeO2. The thermal conductivities of Sm2(Zr0.8Ce0.2)2O7 and Sm2(Zr0.7Ce0.3)2O7 decrease gradually with an increase in temperature. These results show that the synthesized ceramic materials can be explored as novel prospective candidate materials for use in new thermal barrier coating systems in the future.

Original languageEnglish
Pages (from-to)226-230
Number of pages5
JournalRare Metals
Volume28
Issue number3
DOIs
Publication statusPublished - Jun 2009

Keywords

  • Solid state reaction
  • Thermal barrier coatings
  • Thermal expansion
  • X-ray methods

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Zhang, H., Sun, K., Xu, Q., Wang, F., Liu, L., Wei, Y., & Chen, X. (2009). Thermophysical properties of Sm2(Zr1-x Ce x )2O7 ceramics. Rare Metals, 28(3), 226-230. https://doi.org/10.1007/s12598-009-0044-0