High temperature thermoelectric transport properties of double-atom-filled clathrate compounds YbxBa8−xGa16Ge30
作者： Xinfeng Tang , Peng Li , Shukang Deng , Qingjie Zhang
DOI: 10.1063/1.2951888
关键词: Ytterbium 、 Analytical chemistry 、 Thermoelectric effect 、 Rietveld refinement 、 Spark plasma sintering 、 Materials science 、 Clathrate hydrate 、 Thermal conductivity 、 Seebeck coefficient 、 Thermal conduction
摘要: Type-I clathrates YbxBa8−xGa16Ge30 (x=0–1.3) filled by ytterbium and barium were synthesized melting reaction method combined with spark plasma sintering method. The structure thermoelectric properties of double-atoms-filled clathrate compounds are investigated. X-ray diffraction patterns Rietveld analysis reveal that the prepared this type-I clathrates. filling atoms exhibit atomic displacement parameters larger than framework atoms. All specimens show n-type conduction room temperature carrier concentration (Np) increases increasing Yb content. electrical conductivity at first then decreases When x=0.7, it reaches maximum. Seebeck coefficient gradually x. substituting for Ba leads to significant influence on lattice thermal compounds. wi...
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