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

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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 Sm2(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.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Henan Institute of Engineering, Zhengzhou, 450007, China

    Hongsong Zhang, Yuan Wei & Xiaoge Chen

  2. Department of Physics and Electronics, Chuxiong University, Chuxiong, 675000, China

    Kun Sun

  3. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China

    Qiang Xu, Fuchi Wang & Ling Liu

Authors
  1. Hongsong Zhang
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  2. Kun Sun
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  3. Qiang Xu
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  4. Fuchi Wang
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  5. Ling Liu
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  6. Yuan Wei
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  7. Xiaoge Chen
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Correspondence to Hongsong Zhang.

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Zhang, H., Sun, K., Xu, Q. et al. Thermophysical properties of Sm2(Zr1−x Ce x )2O7 ceramics. Rare Metals 28, 226–230 (2009). https://doi.org/10.1007/s12598-009-0044-0

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  • DOI: https://doi.org/10.1007/s12598-009-0044-0

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