Work

Fabrication of the Crystal-Oriented Thermoelectric Material Bi2Te3 by Slip Casting under a High Magnetic Field

Year: 2006

Type: article

Abstract: It is well known that the electric and thermal conductivities of materials depend largely on their crystal orientation. Meanwhile, the imposition of a high magnetic field is a very effective method of obtaining highly crystal-aligned structures. Recently, thermoelectric materials, that is, materials which can directly convert electrical energy to thermal energy and vice versa, have attracted significant attention for their potential uses in solving environmental problems.In this study, highly crystal-aligned structures of Bi2Te3 compact were prepared by introducing crystal alignment into a green sample by conducting slip casting under a high magnetic field, followed by compaction by pulse-discharge sintering (PDS). By aligning the crystal orientation, electric resistivity was reduced, while the Seebeck coefficient maintained a value nearly identical to that of non-aligned crystals. The reference value of a dimensionless figure of merit as high as 1.3 at 323 K was obtained.

Source: MATERIALS TRANSACTIONS

DOI: 10.2320/matertrans.47.2387

Authors: Toshiyuki Kuribayashi, Mun-Gyu Sung, Takashi Itoh, Kensuke Sassa, Shigeo Asai

Institutions: Nagoya University, National Institute of Advanced Industrial Science and Technology

Language: English

Topic: Advanced Thermoelectric Materials and Devices

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: bronze