Ternary eutectic growth of nanostructured thermoelectric Ag-Pb-Te materials

Hsin Jay Wu; Wei Jian Foo; Sinn Wen Chen; G. Jeffrey Snyder

doi:10.1063/1.4733661

Ternary eutectic growth of nanostructured thermoelectric Ag-Pb-Te materials

Hsin Jay Wu, Wei Jian Foo, Sinn Wen Chen^*, G. Jeffrey Snyder

^*Corresponding author for this work

Materials Science and Engineering

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

23 Scopus citations

Abstract

Nanostructured Ag-Pb-Te thermoelectric materials were fabricated by unidirectionally solidifying the ternary Ag-Pb-Te eutectic and near-eutectic alloys using the Bridgeman method. Specially, the Bridgman-grown eutectic alloy exhibited a partially aligned lamellar microstructure, which consisted of Ag ₅Te ₃ and Te phases, with additional 200-600 nm size particles of PbTe. The self-assembled interfaces altered the thermal and electronic transport properties in the bulk Ag-Pb-Te eutectic alloy. Presumably due to phonon scattering from the nanoscale microstructure, a low thermal conductivity (κ 0.3 W/mK) was achieved of the eutectic alloy, leading to a zT peak of 0.41 at 400 K.

Original language	English (US)
Article number	023107
Journal	Applied Physics Letters
Volume	101
Issue number	2
DOIs	https://doi.org/10.1063/1.4733661
State	Published - Jul 9 2012

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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@article{121f328e9974490ba7f266d69a136c0b,

title = "Ternary eutectic growth of nanostructured thermoelectric Ag-Pb-Te materials",

abstract = "Nanostructured Ag-Pb-Te thermoelectric materials were fabricated by unidirectionally solidifying the ternary Ag-Pb-Te eutectic and near-eutectic alloys using the Bridgeman method. Specially, the Bridgman-grown eutectic alloy exhibited a partially aligned lamellar microstructure, which consisted of Ag 5Te 3 and Te phases, with additional 200-600 nm size particles of PbTe. The self-assembled interfaces altered the thermal and electronic transport properties in the bulk Ag-Pb-Te eutectic alloy. Presumably due to phonon scattering from the nanoscale microstructure, a low thermal conductivity (κ 0.3 W/mK) was achieved of the eutectic alloy, leading to a zT peak of 0.41 at 400 K.",

author = "Wu, {Hsin Jay} and Foo, {Wei Jian} and Chen, {Sinn Wen} and {Jeffrey Snyder}, G.",

note = "Funding Information: The authors acknowledge the financial support of National Science Council of Taiwan (NSC 99-2221-E-007-093-MY3 and Grant 100-2917-I-007-001) and of the Air Force Office of Scientific Research (AFOSR MURI FA9550-10-1-0533) of USA.",

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doi = "10.1063/1.4733661",

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AU - Wu, Hsin Jay

AU - Foo, Wei Jian

AU - Chen, Sinn Wen

AU - Jeffrey Snyder, G.

N1 - Funding Information: The authors acknowledge the financial support of National Science Council of Taiwan (NSC 99-2221-E-007-093-MY3 and Grant 100-2917-I-007-001) and of the Air Force Office of Scientific Research (AFOSR MURI FA9550-10-1-0533) of USA.

PY - 2012/7/9

Y1 - 2012/7/9

N2 - Nanostructured Ag-Pb-Te thermoelectric materials were fabricated by unidirectionally solidifying the ternary Ag-Pb-Te eutectic and near-eutectic alloys using the Bridgeman method. Specially, the Bridgman-grown eutectic alloy exhibited a partially aligned lamellar microstructure, which consisted of Ag 5Te 3 and Te phases, with additional 200-600 nm size particles of PbTe. The self-assembled interfaces altered the thermal and electronic transport properties in the bulk Ag-Pb-Te eutectic alloy. Presumably due to phonon scattering from the nanoscale microstructure, a low thermal conductivity (κ 0.3 W/mK) was achieved of the eutectic alloy, leading to a zT peak of 0.41 at 400 K.

AB - Nanostructured Ag-Pb-Te thermoelectric materials were fabricated by unidirectionally solidifying the ternary Ag-Pb-Te eutectic and near-eutectic alloys using the Bridgeman method. Specially, the Bridgman-grown eutectic alloy exhibited a partially aligned lamellar microstructure, which consisted of Ag 5Te 3 and Te phases, with additional 200-600 nm size particles of PbTe. The self-assembled interfaces altered the thermal and electronic transport properties in the bulk Ag-Pb-Te eutectic alloy. Presumably due to phonon scattering from the nanoscale microstructure, a low thermal conductivity (κ 0.3 W/mK) was achieved of the eutectic alloy, leading to a zT peak of 0.41 at 400 K.

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Ternary eutectic growth of nanostructured thermoelectric Ag-Pb-Te materials

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