Effect of HPHT processing on the structure, and thermoelectric properties of Co4Sb12 co-doped with Te and Sn

Te–Sn co-doped Co4Sb12 bulk polycrystalline materials Co4Sb11.7−xTexSn0.3 have been prepared using a high pressure and high temperature method and then characterized using X-ray diffraction. The aim was to use the disorder of the lattice orientation generated by both high pressure and doping with Te and Sn to reduce the thermal conductivity. The thermoelectric properties were measured at room temperature. As expected, as the synthesis pressure increased, the Seebeck coefficient and electrical resistivity increased, but the thermal conductivity decreased greatly. A minimum thermal conductivity of 2.41 W m−1 K−1 was obtained at room temperature for Co4Sb11Te0.7Sn0.3 synthesized at 3 GPa.

[1]  L. Deng,et al.  The thermoelectric properties of Co4Sb12-xTex synthesized at different pressure , 2011 .

[2]  G. Zou,et al.  Giant improved thermoelectric properties in PbTe by HPHT at room temperature , 2002 .

[3]  Qingjie Zhang,et al.  Microstructure and thermoelectric properties of CoSb2.75Ge0.25−xTex prepared by rapid solidification , 2012 .

[4]  David C. Johnson,et al.  Probing the Effects of Alloying, Grain Size, and Turbostratic Disorder on Thermal Conductivity , 2011 .

[5]  Xiao Gong,et al.  Controlling surface properties of polyelectrolyte multilayers by assembly pH. , 2013, Physical chemistry chemical physics : PCCP.

[6]  Qingjie Zhang,et al.  The role of Ga in Ba0.30GaxCo4Sb12+x filled skutterudites , 2012 .

[7]  R. K. Williams,et al.  Filled Skutterudite Antimonides: A New Class of Thermoelectric Materials , 1996, Science.

[8]  Lidong Chen,et al.  Electrical properties and microcosmic study on compound defects in Ga-containing thermoelectric skutterudites , 2014 .

[9]  Tiejun Zhu,et al.  Nanostructuring and thermoelectric properties of bulk skutterudite compound CoSb3 , 2007 .

[10]  Qingjie Zhang,et al.  Structure and Transport Properties of Double-Doped CoSb2.75Ge0.25–xTex (x = 0.125–0.20) with in Situ Nanostructure , 2011 .

[11]  S. V. Ovsyannikov,et al.  Pressure-tuned colossal improvement of thermoelectric efficiency of PbTe , 2007 .

[12]  Jihui Yang,et al.  Dual-frequency resonant phonon scattering in BaxRyCo4Sb12 （R=La, Ce and Sr） , 2007 .

[13]  Hong-an Ma,et al.  First-principles investigation of electronic structure and transport properties of CoSb3 under different pressures , 2012 .

[14]  T. Hirai,et al.  Thermoelectric Properties of Te-doped CoSb3 by spark plasma sintering , 2005 .

[15]  F. Disalvo,et al.  Thermoelectric cooling and power generation , 1999, Science.

[16]  G. Zou,et al.  A new method of synthesis for thermoelectric materials: HPHT , 2002 .

[17]  Lidong Chen,et al.  Thermoelectrics: Direct Solar Thermal Energy Conversion , 2008 .

[18]  L. Deng,et al.  Enhanced thermoelectric properties in Co4Sb12 − xTex alloys prepared by HPHT , 2009 .

[19]  Weishu Liu,et al.  Improvement of Thermoelectric Performance of CoSb3-xTex Skutterudite Compounds by Additional Substitution of IVB-Group Elements for Sb , 2008 .

[20]  Y. Fei,et al.  Pressure Tuning in the Chemical Search for Improved Thermoelectric Materials: NdxCe3-xPt3Sb4 , 2000 .

[21]  Sung‐Jin Kim,et al.  An alternative strategy to construct interfaces in bulk thermoelectric material: nanostructured heterophase Bi2Te3/Bi2S3 , 2013 .

[22]  T. Liang,et al.  Ultra-fast synthesis and thermoelectric properties of Te doped skutterudites , 2014 .