Ternary eutectic growth of nanostructured thermoelectric Ag-Pb-Te materials
Journal
Applied Physics Letters
Journal Volume
101
Journal Issue
2
Start Page
23107
ISSN
00036951
Date Issued
2012
Author(s)
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. © 2012 American Institute of Physics.
Description
論文編號: 23107
Type
journal article