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Scientific paper
Jan 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aipc..504.1494n&link_type=abstract
SPACE TECHNOLOGY AND APPLICATIONS INTERNATIONAL FORUM - 2000. AIP Conference Proceedings, Volume 504, pp. 1494-1499 (2000).
Other
Other Crystalline Inorganic Semiconductors, Thermoelectric And Thermomagnetic Effects, Experimental Determination Of Defects By Diffraction And Scattering
Scientific paper
Low temperature thermoelectric properties of Bi2(1-x)In2xTe3 ternary samples have been measured in the 50-300 K temperature range. At room temperature, the thermal conductivity decreases with increasing In2Te3 content, reaches a minimum at x=0.2 and then slightly increases with increasing In2Te3 concentration. For x=0.1 and x=0.2 samples, the thermal conductivity varies approximately as 1/T, which may indicate that the defect scattering with phonon is predominant to thermal conduction. Seebeck coefficient and electrical resistivity have been measured and the thermoelectric figure merit calculated. The maximum value obtained is ZT=0.5 around 300 K, a value comparable to those of state-of-the-art thermoelectric semiconductors. From x-ray diffraction measurements, it is found that these samples are composites with In2Te3 particles in Bi2Te3. In this case, the phonons would be scattered by the inclusion particles, depending on their size which is critical for achieving an increase in ZT compare to Bi2Te3. An increase in ZT could be achieved for an optimal particle size of In2Te3. .
Ferhat Marhoun
Nagao Jiro
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