TY - GEN
T1 - Synthesis of nano-sized Co-Sb compounds through solvothermal routes
AU - Yang, L.
AU - Hng, H. H.
AU - Sun, T.
AU - Cheng, H.
AU - Ma, J.
PY - 2008
Y1 - 2008
N2 - Skutterudite materials have received great attention because their promising properties for thermoelectric (TE) applications. Among the family of skutterudites, CoSb3 has been intensively investigated due to its large electrical conductivity and Seebeck coefficient. However, its thermal conductivity is too high to make it an effective TE material. Nanostructuring of CoSb3 has the desirable effects of reducing its lattice thermal conductivity as the point imperfections or grain boundaries can scatter phonons (heat carrier) more effectively than electrons (charge carrier). In this study, nanostructured CoSb3 was synthesized by solvothermal routes using CoCl2·6H2O and SbCl3 as precursors dissolved in anhydrous ethanol with the reaction temperature kept at 240°C In addition to the CoSb3 phase, other Co-Sb compounds were also formed during the reaction process. In this paper, we investigated the effects of processing parameters, such as concentration of CoCl2· 6H2O, SbCl3 and NaBH4 in ethanol and thermal duration of solvothermal synthesis, on the yield of CoSb3 phase.
AB - Skutterudite materials have received great attention because their promising properties for thermoelectric (TE) applications. Among the family of skutterudites, CoSb3 has been intensively investigated due to its large electrical conductivity and Seebeck coefficient. However, its thermal conductivity is too high to make it an effective TE material. Nanostructuring of CoSb3 has the desirable effects of reducing its lattice thermal conductivity as the point imperfections or grain boundaries can scatter phonons (heat carrier) more effectively than electrons (charge carrier). In this study, nanostructured CoSb3 was synthesized by solvothermal routes using CoCl2·6H2O and SbCl3 as precursors dissolved in anhydrous ethanol with the reaction temperature kept at 240°C In addition to the CoSb3 phase, other Co-Sb compounds were also formed during the reaction process. In this paper, we investigated the effects of processing parameters, such as concentration of CoCl2· 6H2O, SbCl3 and NaBH4 in ethanol and thermal duration of solvothermal synthesis, on the yield of CoSb3 phase.
KW - Nanostructure
KW - Skutterudites
KW - Solvothermal
KW - Thermoelectric
UR - http://www.scopus.com/inward/record.url?scp=45749103714&partnerID=8YFLogxK
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U2 - 10.4028/3-908451-50-7.57
DO - 10.4028/3-908451-50-7.57
M3 - Conference contribution
AN - SCOPUS:45749103714
SN - 9771012039401
T3 - Solid State Phenomena
SP - 57
EP - 62
BT - Advanced Structural and Functional Materials for Protection
PB - Trans Tech Publications Ltd
T2 - International Conference on Materials for Advanced Technologies 2007, ICMAT-2007
Y2 - 1 July 2007 through 6 July 2007
ER -