文献类型：期刊文献

英文题名：Synthesis and Thermoelectric Properties of the Clathrate-I Phase K8LixGe44?x/42?3x/4

作者：Liang, Ying[1]; Schnelle, Walter[2]; Veremchuk, Igor[2]; B?hme, Bodo[2]; Baitinger, Michael[2]; Grin, Yuri[2]

机构：[1] Institute of Nuclear Technology and Application, School of Science, East China University of Science and Technology, Meilong Road 130, Shanghai, 200237, China; [2] Max-Planck-Institut für Chemische Physik fester Stoffe, N?thnitzer Stra?e 40, Dresden, 01187, Germany

年份：2015

卷号：44

期号：11

起止页码：4444

外文期刊名：Journal of Electronic Materials

收录：EI(收录号：20153201124629)

语种：英文

外文关键词：Thermoelectricity - Hydrates - Thermal conductivity - Lattice constants - Spark plasma sintering - Thermoelectric equipment - X ray powder diffraction - Temperature distribution

摘要：Thermoelectric transport properties at temperatures below 300K were determined for clathrate-I phases K8LixGe44?x/42?3x/4 ( denotes a vacancy) with compositions 0.25≤x≤2.7. Samples were prepared by solid-state reaction and compacted by spark plasma sintering. The lattice constants and chemical composition of the samples were investigated by x-ray powder diffraction and wavelength dispersive x-ray spectroscopy, respectively. Depending on composition, the temperature dependence of the electrical resistivity is metal or semiconductor-like. Absolute value of the negative Seebeck coefficient (n-type conductivity) increased linearly with temperature. All samples had low thermal conductivity of 1–1.5Wm?1K?1 at 300K. ? 2015, The Minerals, Metals & Materials Society.