Enhanced thermoelectric performance in p-type BiSbTe bulk alloy with nanoinclusion of ZnAlO

p-type BiSbTe/x wt % ZnAlO (x=0, 0.25, 0.5, 0.75, and 1.0) composites were prepared by zone melting method. A peak thermoelectric figure of merit (ZT) of 1.33 at 370 K was achieved for the sample with x=0.75, about 34% higher than that of BiSbTe at the same temperature, making these composites more attractive for commercial applications. This enhancement of ZT can be mainly ascribed to a remarkable increase of the electrical conductivity and a simultaneous decrease of the lattice thermal conductivity by the introduction of ZnAlO nanopowder.

[1]  Terry M. Tritt,et al.  High thermoelectric performance BiSbTe alloy with unique low-dimensional structure , 2009 .

[2]  Anze Shui,et al.  Preparation and properties for aluminum-doped zinc oxide powders with the coprecipitation method , 2009 .

[3]  R. Venkatasubramanian,et al.  Thin-film thermoelectric devices with high room-temperature figures of merit , 2001, Nature.

[4]  H. Terryn,et al.  Optical and thermoelectric characterizations of electroplated n-Bi2(Te0.9Se0.1)3 , 2007 .

[5]  H. Hng,et al.  Characterization of Al-doped ZnO thermoelectric materials prepared by RF plasma powder processing and hot press sintering , 2009 .

[6]  Kyeongsoon Park,et al.  Thermoelectric properties of p-type Bi0.5Sb1.5Te3 for solid-state cooling devices , 2010 .

[7]  G. J. Snyder,et al.  Complex thermoelectric materials. , 2008, Nature materials.

[8]  D. Rowe.  CRC Handbook of Thermoelectrics , 1995 .

[9]  A. Balandin,et al.  Mechanism for thermoelectric figure-of-merit enhancement in regimented quantum dot superlattices , 2003 .

[10]  K. Cai,et al.  Preparation and thermoelectric properties of Al-doped ZnO ceramics , 2003 .

[11]  Li Shi,et al.  Thermoelectric properties of individual electrodeposited bismuth telluride nanowires , 2005 .

[12]  Min Zhou,et al.  Thermoelectric and mechanical properties of nano-SiC-dispersed Bi2Te3 fabricated by mechanical alloying and spark plasma sintering , 2008 .

[13]  J. Bowers,et al.  Effect of nanoparticle scattering on thermoelectric power factor , 2009 .

[14]  K. Watari,et al.  Correlations between thermoelectric properties and effective mass caused by lattice distortion in Al-doped ZnO ceramics , 2009 .

[15]  J. Bowers,et al.  Effect of Nanoparticles on Electron and Thermoelectric Transport , 2009 .

[16]  Zhongyuan Liu,et al.  Enhanced thermoelectric figure of merit in nanocrystalline Bi2Te3 bulk , 2009, Journal of Applied Physics.

[17]  M. Dresselhaus,et al.  Structure study of bulk nanograined thermoelectric bismuth antimony telluride. , 2009, Nano letters.

[18]  Xing Zhang,et al.  Bismuth telluride nanotubes and the effects on the thermoelectric properties of nanotube-containing nanocomposites , 2005 .

[19]  Zeming He,et al.  Nano ZrO2/CoSb3 composites with improved thermoelectric figure of merit , 2007 .

[20]  Xiangyang Huang,et al.  Effects of nano-TiO2 dispersion on the thermoelectric properties offilled-skutterudite Ba0.22Co4Sb12 , 2009 .