High thermoelectric properties of PbTe-Sm2Se3 composites

J. Q. Li; Z. W. Lu; S. M. Li; F. S. Liu; W. Q. Ao; Y. Li

doi:10.1016/j.scriptamat.2015.09.036

High thermoelectric properties of PbTe-Sm₂Se₃ composites

J. Q. Li, Z. W. Lu, S. M. Li, F. S. Liu, W. Q. Ao, Y. Li

Shenzhen University

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

13 Scopus citations

Abstract

Composites of nominal composition (Pb_0.96Na_0.04Te)_{1 - x}(Sm₂Se₃)_x with x = 0, 0.005, 0.015, 0.02, 0.025, 0.040 and 0.050 have been synthesized to study their thermoelectric properties. In these composites, Sm₂Se₃ is the secondary phase. It increases the hole carrier concentration due to more Na dissolved in the PbTe-based solid solution by replacing Te with Se, but decreases its carrier mobility. The Sm₂Se₃ reduces the power factor slightly, but reduces the thermal conductivity significantly. As a result, the figure of merit ZT can be enhanced with proper Sm₂Se₃ content. The highest ZT achieved is 1.5 in the composite with x = 0.025.

Original language	English
Pages (from-to)	144-147
Number of pages	4
Journal	Scripta Materialia
Volume	112
DOIs	https://doi.org/10.1016/j.scriptamat.2015.09.036
State	Published - Feb 2016
Externally published	Yes

Keywords

Electrical properties
Spark plasma sintering
Thermal conductivity
Thermoelectric materials

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10.1016/j.scriptamat.2015.09.036

Cite this

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title = "High thermoelectric properties of PbTe-Sm2Se3 composites",

abstract = "Composites of nominal composition (Pb0.96Na0.04Te)1 - x(Sm2Se3)x with x = 0, 0.005, 0.015, 0.02, 0.025, 0.040 and 0.050 have been synthesized to study their thermoelectric properties. In these composites, Sm2Se3 is the secondary phase. It increases the hole carrier concentration due to more Na dissolved in the PbTe-based solid solution by replacing Te with Se, but decreases its carrier mobility. The Sm2Se3 reduces the power factor slightly, but reduces the thermal conductivity significantly. As a result, the figure of merit ZT can be enhanced with proper Sm2Se3 content. The highest ZT achieved is 1.5 in the composite with x = 0.025.",

keywords = "Electrical properties, Spark plasma sintering, Thermal conductivity, Thermoelectric materials",

author = "Li, {J. Q.} and Lu, {Z. W.} and Li, {S. M.} and Liu, {F. S.} and Ao, {W. Q.} and Y. Li",

year = "2016",

month = feb,

doi = "10.1016/j.scriptamat.2015.09.036",

language = "英语",

volume = "112",

pages = "144--147",

journal = "Scripta Materialia",

issn = "1359-6462",

publisher = "Acta Materialia Inc",

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TY - JOUR

T1 - High thermoelectric properties of PbTe-Sm2Se3 composites

AU - Li, J. Q.

AU - Lu, Z. W.

AU - Li, S. M.

AU - Liu, F. S.

AU - Ao, W. Q.

AU - Li, Y.

PY - 2016/2

Y1 - 2016/2

N2 - Composites of nominal composition (Pb0.96Na0.04Te)1 - x(Sm2Se3)x with x = 0, 0.005, 0.015, 0.02, 0.025, 0.040 and 0.050 have been synthesized to study their thermoelectric properties. In these composites, Sm2Se3 is the secondary phase. It increases the hole carrier concentration due to more Na dissolved in the PbTe-based solid solution by replacing Te with Se, but decreases its carrier mobility. The Sm2Se3 reduces the power factor slightly, but reduces the thermal conductivity significantly. As a result, the figure of merit ZT can be enhanced with proper Sm2Se3 content. The highest ZT achieved is 1.5 in the composite with x = 0.025.

AB - Composites of nominal composition (Pb0.96Na0.04Te)1 - x(Sm2Se3)x with x = 0, 0.005, 0.015, 0.02, 0.025, 0.040 and 0.050 have been synthesized to study their thermoelectric properties. In these composites, Sm2Se3 is the secondary phase. It increases the hole carrier concentration due to more Na dissolved in the PbTe-based solid solution by replacing Te with Se, but decreases its carrier mobility. The Sm2Se3 reduces the power factor slightly, but reduces the thermal conductivity significantly. As a result, the figure of merit ZT can be enhanced with proper Sm2Se3 content. The highest ZT achieved is 1.5 in the composite with x = 0.025.

KW - Electrical properties

KW - Spark plasma sintering

KW - Thermal conductivity

KW - Thermoelectric materials

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U2 - 10.1016/j.scriptamat.2015.09.036

DO - 10.1016/j.scriptamat.2015.09.036

M3 - 文章

AN - SCOPUS:84948713170

SN - 1359-6462

VL - 112

SP - 144

EP - 147

JO - Scripta Materialia

JF - Scripta Materialia

ER -

High thermoelectric properties of PbTe-Sm₂Se₃ composites

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Keywords

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