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Protective Properties of Various Coatings on CoSb3 Thermoelectric Material

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Abstract

In this study, various coatings including Mo, Ti, Y2O3-stabilized ZrO2 (YSZ)/Ti films were deposited on the CoSb3 substrate using magnetron sputtering to suppress the sublimation of antimony in CoSb3 during thermal aging tests. The microstructure and growth of films were observed using scanning electron and atomic force microscopes. The thermal aging behavior of CoSb3 coated with various films was investigated through an accelerated experiment at 923 K for 24 h. The weight loss of CoSb3 decreased with the thickness of coatings increasing. Among these films, the YSZ/Ti film can suppress the sublimation of antimony in CoSb3 more effectively. Compared with the uncoated CoSb3 material, the degradation of thermoelectric properties for coated CoSb3 samples decreased slowly after the accelerated thermal aging test.

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Acknowledgements

Financial support was received from the Opening Project of the State Key Laboratory of High Performance Ceramics and Superfine Microstructure (SKL201405SIC) and National Natural Science Foundation of China (51202088). The authors would like to thank the help from Shandong University and Shandong Research and Design Institute of Industrial Ceramics for the measurement of TE properties.

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Authors and Affiliations

  1. School of Materials Science and Engineering, University of Jinan, Jinan, 250022, China

    Degang Zhao, Di Wu, Jiai Ning & Min Zuo

  2. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China

    Degang Zhao

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  1. Degang Zhao
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  2. Di Wu
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  3. Jiai Ning
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  4. Min Zuo
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Correspondence to Degang Zhao.

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Zhao, D., Wu, D., Ning, J. et al. Protective Properties of Various Coatings on CoSb3 Thermoelectric Material. J. Electron. Mater. 46, 3036–3042 (2017). https://doi.org/10.1007/s11664-016-5141-x

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  • DOI: https://doi.org/10.1007/s11664-016-5141-x

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