化合物Tl/sub 9/-X-Q/sub 6/ (X=锑、铋)的热电性质Q =硒、碲)

Eighteenth International Conference on Thermoelectrics. Proceedings, ICT'99 (Cat. No.99TH8407) Pub Date : 1999-08-29 DOI:10.1109/ICT.1999.843448

B. Wolfing, C. Kloc, A. Ramirez, E. Bucher

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引用次数: 2

摘要

Tl/sub 9/XQ/sub 6/-类化合物与二元化合物Tl/sub 5/Te/sub 3/有关。它在四方空间群I4/mcm中结晶。这些化合物是通过将元素按化学计量比混合并在真空下将其熔化在石英安瓿中合成的。通过测量电阻率、热功率和导热系数作为温度的函数来确定热电性能。在300 K时，化合物的热功率在90 /spl mu/V/K (Tl/sub 9/SbTe/sub 6/)和400 /spl mu/V/K (Tl/sub 9/BiSe/sub 6/)之间。电阻率范围为2.5 m/spl ω /cm (Tl/sub 9/SbTe/sub 6/)至83 m/spl ω /cm (Tl/sub 9/BiTe/sub 6/)。室温下导热系数小于1.5 W/mK。

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Thermoelectric properties of the compounds Tl/sub 9/-X-Q/sub 6/ (X=antimony, bismuth; Q=selenium, tellurium)

The Tl/sub 9/XQ/sub 6/-class of compounds is related to the binary compound Tl/sub 5/Te/sub 3/. It is crystallizing in the tetragonal space group I4/mcm. The compounds were synthesized by mixing the elements in stoichiometric ratios and melting them in quartz ampoules under vacuum. Electrical resistivity, thermopower and thermal conductivity were measured as function of temperature to determine the thermoelectric figure of merit. At 300 K the compounds show thermopowers between 90 /spl mu/V/K (Tl/sub 9/SbTe/sub 6/) and 400 /spl mu/V/K (Tl/sub 9/BiSe/sub 6/). The electrical resistivities range from 2.5 m/spl Omega/cm (Tl/sub 9/SbTe/sub 6/) to 83 m/spl Omega/cm (Tl/sub 9/BiTe/sub 6/). The thermal conductivity at room temperature is less than 1.5 W/mK.

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Eighteenth International Conference on Thermoelectrics. Proceedings, ICT'99 (Cat. No.99TH8407)

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