Synthesis of nano-sized Co-Sb compounds through solvothermal routes

L. Yang; H. H. Hng; T. Sun; H. Cheng; J. Ma

doi:10.4028/www.scientific.net/SSP.136.57

Synthesis of nano-sized Co-Sb compounds through solvothermal routes

L. Yang, H. H. Hng^*, T. Sun, H. Cheng, J. Ma

^*Corresponding author for this work

Nanyang Technological University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

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.

Original language	English
Title of host publication	Advanced Structural and Functional Materials for Protection
Editors	William Lau, Shang Huai Min, Lee Nam Sua, Ma Jan, Alfred Tok
Publisher	Trans Tech Publications Ltd
Pages	57-62
Number of pages	6
ISBN (Print)	9783908451501
DOIs	https://doi.org/10.4028/www.scientific.net/SSP.136.57
Publication status	Published - 2008
Externally published	Yes
Event	International Conference on Materials for Advanced Technologies, ICMAT 2007 - Singapore, Singapore Duration: Jul 1 2007 → Jul 6 2007

Publication series

Name	Solid State Phenomena
Volume	136
ISSN (Print)	1012-0394
ISSN (Electronic)	1662-9779

Conference

Conference	International Conference on Materials for Advanced Technologies, ICMAT 2007
Country/Territory	Singapore
City	Singapore
Period	7/1/07 → 7/6/07

Bibliographical note

Publisher Copyright:
© (2008) Trans Tech Publications, Switzerland.

ASJC Scopus Subject Areas

Atomic and Molecular Physics, and Optics
General Materials Science
Condensed Matter Physics

Keywords

Nanostructure
Skutterudites
Solvothermal
Thermoelectric

Access to Document

10.4028/www.scientific.net/SSP.136.57

Cite this

Yang, L., Hng, H. H., Sun, T., Cheng, H., & Ma, J. (2008). Synthesis of nano-sized Co-Sb compounds through solvothermal routes. In W. Lau, S. H. Min, L. N. Sua, M. Jan, & A. Tok (Eds.), Advanced Structural and Functional Materials for Protection (pp. 57-62). (Solid State Phenomena; Vol. 136). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/SSP.136.57

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title = "Synthesis of nano-sized Co-Sb compounds through solvothermal routes",

abstract = "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.",

keywords = "Nanostructure, Skutterudites, Solvothermal, Thermoelectric",

author = "L. Yang and Hng, {H. H.} and T. Sun and H. Cheng and J. Ma",

note = "Publisher Copyright: {\textcopyright} (2008) Trans Tech Publications, Switzerland.; International Conference on Materials for Advanced Technologies, ICMAT 2007 ; Conference date: 01-07-2007 Through 06-07-2007",

year = "2008",

doi = "10.4028/www.scientific.net/SSP.136.57",

language = "English",

isbn = "9783908451501",

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Yang, L, Hng, HH, Sun, T, Cheng, H & Ma, J 2008, Synthesis of nano-sized Co-Sb compounds through solvothermal routes. in W Lau, SH Min, LN Sua, M Jan & A Tok (eds), Advanced Structural and Functional Materials for Protection. Solid State Phenomena, vol. 136, Trans Tech Publications Ltd, pp. 57-62, International Conference on Materials for Advanced Technologies, ICMAT 2007, Singapore, Singapore, 7/1/07. https://doi.org/10.4028/www.scientific.net/SSP.136.57

Synthesis of nano-sized Co-Sb compounds through solvothermal routes. / Yang, L.; Hng, H. H.; Sun, T. et al.
Advanced Structural and Functional Materials for Protection. ed. / William Lau; Shang Huai Min; Lee Nam Sua; Ma Jan; Alfred Tok. Trans Tech Publications Ltd, 2008. p. 57-62 (Solid State Phenomena; Vol. 136).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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.

N1 - Publisher Copyright: © (2008) Trans Tech Publications, Switzerland.

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

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BT - Advanced Structural and Functional Materials for Protection

A2 - Lau, William

A2 - Min, Shang Huai

A2 - Sua, Lee Nam

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PB - Trans Tech Publications Ltd

T2 - International Conference on Materials for Advanced Technologies, ICMAT 2007

Y2 - 1 July 2007 through 6 July 2007

ER -

Synthesis of nano-sized Co-Sb compounds through solvothermal routes

Abstract

Publication series

Conference

Bibliographical note

ASJC Scopus Subject Areas

Keywords

Access to Document

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