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Commercial ZrO2 paints as coatings for SiGe thermoelectric materials

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Abstract

The use of ZrO2 paints to coat SiGe materials used in radioisotopic thermoelectric generators was studied. The best results were obtained when the SiGe alloys were double coated with a 200 h anneal at 1000° C after each coating. The thermoelectric properties of these coated samples were about the same as for the SiGe alloys coated by SiO2 or Si3N4. The vapoursupression properties of the best ZrO2 coatings fell between those of SiO2 and Si3N4. In the SiGe doped with GaP alloys, the interface between the oxide coating and alloy is enriched with Ga2O3.

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Author notes

  1. T. Amano

    Present address: Sagami Institute of Technology, Tsujido-Nishikaigan Fujisawa, 251, Kanagawa, Japan

Authors and Affiliations

  1. Ames Laboratory and Department of Materials Science and Engineering, Iowa State University, 50011, Ames, Iowa, USA

    T. Amano, B. J. Beaudry, K. A. Gschneidner Jr. & F. C. Laabs

Authors
  1. T. Amano
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  2. B. J. Beaudry
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  3. K. A. Gschneidner Jr.
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  4. F. C. Laabs
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Amano, T., Beaudry, B.J., Gschneidner, K.A. et al. Commercial ZrO2 paints as coatings for SiGe thermoelectric materials. J Mater Sci 24, 3831–3836 (1989). https://doi.org/10.1007/BF01168943

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  • DOI: https://doi.org/10.1007/BF01168943

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