Synthesis and Thermoelectric Properties of Ba8Ga16+xSbxGe30-2x (x=0,1) Clathrate Single Crystals

摘要：

　　Ba8Ga16Ge30 clathrate material has being intensely investigated as a candidate of promising thermoelectric materials.In this work,BasGa16+xSbxGe30-2x (x=0,1) single crystals have been synthesized by the Ga flux method,using high purity elemental Ba,Sb,Ga,and Ge as starting materials.Powder X-ray diffraction,Scanning electron microscopy equipped with energy-dispersive X-ray spectroscopy and Raman spectroscopy were used to characterize the single crystals.Seebeck coefficient of the crystals was measured from 300 to 800 K.The result indicates that the crystals are p-type semiconductor,which is different from the crystals synthesized by the Czochralski method.The Seebeck coefficient almost does not change after doping Sb in the whole temperature measured and it is in the range of 200 to 300μV/K.

关键词： Thermoelectric Clathrate Single crystal Ba8Ga17SbGe28

作者: H.F.Wang K.F.Cai H.Li L.Wang X.L.Li

作者单位: Functional Materials Research Laboratory,Tongji University,Shanghai 200092,China

会议类型: 国际会议

会议名称: The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))

会议地点: 长沙

会议语种:英文

页码: 553-555

在线出版日期: 2007-05-10（万方平台首次上网日期，不代表论文的发表时间）