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

✍ Scribed by H. Mori; H. Sakata

• Publisher: Springer
• Year: 1996
• Tongue: English
• Weight: 337 KB
• Volume: 31
• Category: Article
• ISSN: 0022-2461
• DOI: 10.1007/bf00357873

✦ Synopsis

The thermoelectric power of glasses in the systems V2Os-Sb2Oa-TeO2 and V2Os-BizOa.-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 gV K -1 for V2Os-Sb2Os-TeO2 glasses, and -391 to -202 tW K-? for VzOa-Bi2Os-TeO2 glasses. For these glasses in both systems, Heikes" formula was satisfi.ed adequately for the relationship between Q and In [Cv/(1 -Cv)] (Cv = V~+/Vtot~., Cv 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 Vs § 4+ was also applicable to the glasses in both systems, and it was concluded that the dominant factor determining Q was Cv.