Correlation between Thermoelectric Properties and Plastic Deformation of p-Type Bi0.5Sb1.5Te3 Thermoelectric Materials
Year: 2006
Type: article
Abstract: A plastic deformation process and ratio study of p-type Bi0.5Sb1.5Te3 was performed. The ingots were grown by the Bridgman method. Disks were cut from the ingots and deformed by either cold-pressing or hot-pressing under pulse current heating. The plastic deformation ratio was controlled in the range from 55 to 90%. The crystal structures of the deformed samples were identified by X-ray diffraction and pole figure analyses. The diffraction patterns indicate that the surfaces and bottoms of the samples were highly oriented in the hexagonal (00-l) plane. Thermoelectric properties change depending on not the plastic deformation ratio but the kind of plastic deformation process. The power factor for hot-press deformed samples exceeded those for the original ingots and cold-press deformed samples. The results suggest that the process of hot-press deformation enhances the thermoelectric properties of p-type Bi0.5Sb1.5Te3.
Authors: Yoshinori Morisaki, Hiroshi Araki, Eishi Tanabe, Hiroyuki Kitagawa, Kazuhiro Hasezaki
Institutions: Shimane University, University of Shimane
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2172409903