Work

Shear Extrusion Method of Bi-Te Based Thermoelectric Material.

Year: 2000

Type: article

Abstract: For improvement of the figure of merit in Bi-Te system, anisotropic microstructure control becomes very important with grain size refinement. The conventional powder compaction processes are mostly ineffective or inefficient in texture control. New alternative processing is strongly awaited to make anisotropic microstructure control for enhancement of thermoelectric properties. In this study, the shear extrusion processing was proposed to make texture control in Bi0.4Sb1.6Te3 alloyment from green compact. In this method, strong shear strain is applied to the sample, resulting in selective shear deformation along the cleavage crystal surface and rearrangement of crystalline orientations through the extrusion passage.As the result, the electrical resistivity of sheared sample was improved from 2.11×10-5(Ωm) to 1.17×10-5 (Ωm) without decrease of Seebeck coefficient. Then, higher power factor of 4.09×10-3 (W/mK2) can be achieved.

Source: Journal of the Japan Society of Powder and Powder Metallurgy

DOI: 10.2497/jjspm.47.1189

Authors: Yasushi Iwaisako, Tatsuhiko Aizawa, Atsushi Yamamoto, Toshitaka Ohta

Institutions: Research Center for Advanced Science and Technology, The University of Tokyo, The University of Tokyo

Language: English

Topic: Advanced Thermoelectric Materials and Devices

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: diamond

OpenAlex ID: W2316858635

FWCI:

Cites: 3

Cited by: 2

Related to: 10