Thermoelectric properties of Bi 2Te 3-PbTe pseudo binary near the eutectic composition

Kyooho Jung; Ho Won Jang; Chong Yun Kang; Myong Jae Yoo; Won Chel Choi; Jin Sang Kim

doi:10.1166/jnn.2012.5581

Thermoelectric properties of Bi ₂Te ₃-PbTe pseudo binary near the eutectic composition

Kyooho Jung, Ho Won Jang, Chong Yun Kang, Myong Jae Yoo, Won Chel Choi, Jin Sang Kim

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

(Bi ₂Te ₃) _1-x(PbTe) _x binary systems near eutectic composition were prepared by melting of elemental metals and a sequential water quenching process and their microstructures and thermoelectric properties were investigated. Multiple phases such as Bi ₂Te ₃, BiPbTe and PbTe were observed due to phase separation when the composition x was higher than the eutectic point. Also the electrical conduction type of the alloys converted from p-type to n-type in the phase separated alloys. The lattice thermal conductivities in the phase-separated alloys are lower than those in alloys without phase separation, attributable to increased boundary scattering.

Original language	English
Pages (from-to)	3492-3495
Number of pages	4
Journal	Journal of Nanoscience and Nanotechnology
Volume	12
Issue number	4
DOIs	https://doi.org/10.1166/jnn.2012.5581
Publication status	Published - 2012
Externally published	Yes

Keywords

PbTe
Phase separation
Thermal conductivity
Thermoelectric

ASJC Scopus subject areas

Bioengineering
Chemistry(all)
Biomedical Engineering
Materials Science(all)
Condensed Matter Physics

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abstract = "(Bi 2Te 3) 1-x(PbTe) x binary systems near eutectic composition were prepared by melting of elemental metals and a sequential water quenching process and their microstructures and thermoelectric properties were investigated. Multiple phases such as Bi 2Te 3, BiPbTe and PbTe were observed due to phase separation when the composition x was higher than the eutectic point. Also the electrical conduction type of the alloys converted from p-type to n-type in the phase separated alloys. The lattice thermal conductivities in the phase-separated alloys are lower than those in alloys without phase separation, attributable to increased boundary scattering.",

keywords = "PbTe, Phase separation, Thermal conductivity, Thermoelectric",

author = "Kyooho Jung and Jang, {Ho Won} and Kang, {Chong Yun} and Yoo, {Myong Jae} and Choi, {Won Chel} and Kim, {Jin Sang}",

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AU - Kang, Chong Yun

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AU - Choi, Won Chel

AU - Kim, Jin Sang

PY - 2012

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N2 - (Bi 2Te 3) 1-x(PbTe) x binary systems near eutectic composition were prepared by melting of elemental metals and a sequential water quenching process and their microstructures and thermoelectric properties were investigated. Multiple phases such as Bi 2Te 3, BiPbTe and PbTe were observed due to phase separation when the composition x was higher than the eutectic point. Also the electrical conduction type of the alloys converted from p-type to n-type in the phase separated alloys. The lattice thermal conductivities in the phase-separated alloys are lower than those in alloys without phase separation, attributable to increased boundary scattering.

AB - (Bi 2Te 3) 1-x(PbTe) x binary systems near eutectic composition were prepared by melting of elemental metals and a sequential water quenching process and their microstructures and thermoelectric properties were investigated. Multiple phases such as Bi 2Te 3, BiPbTe and PbTe were observed due to phase separation when the composition x was higher than the eutectic point. Also the electrical conduction type of the alloys converted from p-type to n-type in the phase separated alloys. The lattice thermal conductivities in the phase-separated alloys are lower than those in alloys without phase separation, attributable to increased boundary scattering.

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KW - Thermal conductivity

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