The effect of powder size on thermoelectric properties of 95%Bi2Te3-5%Bi2Se3 alloy

S. J. Hong; K. S. Hwang; J. W. Byeon; M. K. Lee; C. K. Rhee; B. S. Chun

doi:10.4028/www.scientific.net/SSP.119.271

The effect of powder size on thermoelectric properties of 95%Bi₂Te₃-5%Bi₂Se₃ alloy

S. J. Hong, K. S. Hwang, J. W. Byeon, M. K. Lee, C. K. Rhee, B. S. Chun

Dept. of Mechanical Convergence Engineering

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

3 Scopus citations

Abstract

The n-type (95%Bi₂Te₃-5%Bi₂Se₃) compound was newly fabricated by gas atomization and hot extrusion, which is considered to be a mass production technique of this alloy. The effect of powder size on thermoelectric properties of 0.04% SbI3 doped 95%Bi₂Te₃- 5%Bi₂Se₃ alloy were investigated. Seebeck coefficient (α) and Electrical resistivity (ρ) increased with increasing powder size due to the decrease in carrier concentration by oxygen content. With increasing powder size, the compressive strength of 95%Bi₂Te₃-5%Bi₂Se₃ alloy was increased due to the relative high density. The compound with ~300 μm size shows the highest power factor among the four different powder sizes. The rapidly solidified and hot extruded compound using 200~300 μm powder size shows the highest compressive strength.

Original language	English
Title of host publication	Nanocomposites and Nanoporous Materials
Editors	Chang Kyu Rhee
Publisher	Trans Tech Publications Ltd
Pages	271-274
Number of pages	4
ISBN (Print)	9783908451273
DOIs	https://doi.org/10.4028/www.scientific.net/SSP.119.271
State	Published - 2007
Event	7th International Symposium on Nanocomposites and Nanoporous Materials, ISNAM 2006 - Gyeongju, Korea, Republic of Duration: 15 Feb 2006 → 17 Feb 2006

Publication series

Name	Solid State Phenomena
Volume	119
ISSN (Print)	1012-0394
ISSN (Electronic)	1662-9779

Conference

Conference	7th International Symposium on Nanocomposites and Nanoporous Materials, ISNAM 2006
Country/Territory	Korea, Republic of
City	Gyeongju
Period	15/02/06 → 17/02/06

Keywords

Bi-Te
Gas atomization
Powder metallurgy
Thermoelectric materials

Access to Document

10.4028/www.scientific.net/SSP.119.271

Cite this

@inproceedings{9728a02c3720433292ec51304ae0b222,

title = "The effect of powder size on thermoelectric properties of 95\%Bi2Te3-5\%Bi2Se3 alloy",

abstract = "The n-type (95\%Bi2Te3-5\%Bi2Se3) compound was newly fabricated by gas atomization and hot extrusion, which is considered to be a mass production technique of this alloy. The effect of powder size on thermoelectric properties of 0.04\% SbI3 doped 95\%Bi2Te3- 5\%Bi2Se3 alloy were investigated. Seebeck coefficient (α) and Electrical resistivity (ρ) increased with increasing powder size due to the decrease in carrier concentration by oxygen content. With increasing powder size, the compressive strength of 95\%Bi2Te3-5\%Bi2Se3 alloy was increased due to the relative high density. The compound with \textasciitilde{}300 μm size shows the highest power factor among the four different powder sizes. The rapidly solidified and hot extruded compound using 200\textasciitilde{}300 μm powder size shows the highest compressive strength.",

keywords = "Bi-Te, Gas atomization, Powder metallurgy, Thermoelectric materials",

author = "Hong, \{S. J.\} and Hwang, \{K. S.\} and Byeon, \{J. W.\} and Lee, \{M. K.\} and Rhee, \{C. K.\} and Chun, \{B. S.\}",

note = "Publisher Copyright: {\textcopyright} (2007) Trans Tech Publications, Switzerland.; 7th International Symposium on Nanocomposites and Nanoporous Materials, ISNAM 2006 ; Conference date: 15-02-2006 Through 17-02-2006",

year = "2007",

doi = "10.4028/www.scientific.net/SSP.119.271",

language = "English",

isbn = "9783908451273",

series = "Solid State Phenomena",

publisher = "Trans Tech Publications Ltd",

pages = "271--274",

editor = "Rhee, \{Chang Kyu\}",

booktitle = "Nanocomposites and Nanoporous Materials",

}

Hong, SJ, Hwang, KS, Byeon, JW, Lee, MK, Rhee, CK & Chun, BS 2007, The effect of powder size on thermoelectric properties of 95%Bi₂Te₃-5%Bi₂Se₃ alloy. in CK Rhee (ed.), Nanocomposites and Nanoporous Materials. Solid State Phenomena, vol. 119, Trans Tech Publications Ltd, pp. 271-274, 7th International Symposium on Nanocomposites and Nanoporous Materials, ISNAM 2006, Gyeongju, Korea, Republic of, 15/02/06. https://doi.org/10.4028/www.scientific.net/SSP.119.271

The effect of powder size on thermoelectric properties of 95%Bi₂Te₃-5%Bi₂Se₃ alloy. / Hong, S. J.; Hwang, K. S.; Byeon, J. W. et al.
Nanocomposites and Nanoporous Materials. ed. / Chang Kyu Rhee. Trans Tech Publications Ltd, 2007. p. 271-274 (Solid State Phenomena; Vol. 119).

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

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AU - Hong, S. J.

AU - Hwang, K. S.

AU - Byeon, J. W.

AU - Lee, M. K.

AU - Rhee, C. K.

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AB - The n-type (95%Bi2Te3-5%Bi2Se3) compound was newly fabricated by gas atomization and hot extrusion, which is considered to be a mass production technique of this alloy. The effect of powder size on thermoelectric properties of 0.04% SbI3 doped 95%Bi2Te3- 5%Bi2Se3 alloy were investigated. Seebeck coefficient (α) and Electrical resistivity (ρ) increased with increasing powder size due to the decrease in carrier concentration by oxygen content. With increasing powder size, the compressive strength of 95%Bi2Te3-5%Bi2Se3 alloy was increased due to the relative high density. The compound with ~300 μm size shows the highest power factor among the four different powder sizes. The rapidly solidified and hot extruded compound using 200~300 μm powder size shows the highest compressive strength.

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KW - Gas atomization

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