Electron Transport Properties of Rapidly Solidified (GeTe)x(AgSbTe2)1-x Pseudobinary Thermoelectric Compounds

(GeTe)(x)(AeSbTe(2))(1-x)(x = 80, 85) compounds were fabricated by melting-hot press and RSP-hot press processes. The (GeTe)(85)(AgSbTe2)(15) compound, which composed of mainly crystalline and partly amorphous structures, was produced in part by rapid solidification. X-ray diffraction analysis showed that the (GeTe)(x)(AgSbTe2)(1-x) compounds represented a single phase of GeTe. The electron transport properties were evaluated over the temperature ranee of RT similar to 773K, and then systematically changed with compositions x in (GeTe)(x)(AgSbTe2)(1-x) compounds. The maximum Seebeck coefficient was 227 mu V/K at 673K in the (GeTe)(80)(AgSbTe2)(20) compounds fabricated by melting and hot-press process. The minimum resistivity was shown in the (GeTe)(85)(AgSbTe2)(15)by melting and hot-press process.