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Composition-dependent transport properties of Ag 1− x Pb 18SbTe 20 prepared by high pressure

Composition-dependent transport properties of Ag 1− x Pb 18SbTe 20 prepared by high pressure,10.1016/j.jallcom.2010.11.038,Journal of Alloys and Compo

Composition-dependent transport properties of Ag 1− x Pb 18SbTe 20 prepared by high pressure  
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Non-stoichiometric Ag1−xPb18SbTe20 (x=0, 0.2, 0.5, 0.7, 0.85) thermoelectric materials were prepared by high pressure method. The composition-dependent transport properties were studied at room temperature. The measurement results show that the carrier concentration and hall mobility of AgPb18SbTe20 could be tuned effectively by adjusting the content of Ag. The Seebeck coefficient and resistivity decrease with an increase of x. The maximum power factor of 2.3×10−3Wm−1K−2 is obtained at x=0.7, which is about 76% higher than that of the sample with stoichiometric composition.
Journal: Journal of Alloys and Compounds - J ALLOYS COMPOUNDS , vol. 509, no. 5, pp. 2430-2433, 2011
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