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Seebeck coefficient of V2O5-R2O3-TeO2 (R = Sb or Bi) glasses

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Abstract

The thermoelectric power of glasses in the systems V2O5-Sb2O3-TeO2 and V2O5-Bi2O3-TeO2 was measured at temperatures in the range 373–473 K. The glasses in both systems were found to be n-type semiconductors. The Seebeck coefficient, Q, at 473 K was determined as −192 to −151 μVK−1 for V2O5-Sb2O3-TeO2 glasses, and −391 to −202 μVK−1 for V2O5-Bi2O3-TeO2 glasses. For these glasses in both systems, Heikes' formula was satisfied adequately for the relationship between Q and In [C v/(1-Cv)] (C v = V4+/Vtotal, C v is the ratio of the concentration of reduced vanadium ions), and discussions confirmed small polaron hopping conduction of the glasses in both systems. Mackenzie's formula relating to Q and V5+/V4+ was also applicable to the glasses in both systems, and it was concluded that the dominant factor determining Q was C v.

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Authors and Affiliations

  1. Department of Applied Chemistry, Faculty of Engineering, Tokai University, 1117, Kitakaname, Hiratsuka-shi, 259-12, Kanagawa, Japan

    H. Mori & H. Sakata

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  1. H. Mori
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  2. H. Sakata
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Mori, H., Sakata, H. Seebeck coefficient of V2O5-R2O3-TeO2 (R = Sb or Bi) glasses. JOURNAL OF MATERIALS SCIENCE 31, 1621–1624 (1996). https://doi.org/10.1007/BF00357873

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  • DOI: https://doi.org/10.1007/BF00357873

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