NDLI: Thermoelectric Properties of Cu-doped Bi$_{2}$Te$_{2.85}$Se$_{0.15}$ Prepared by Pulse-Current Sintering Under Cyclic Uniaxial Pressure

Content Provider	Springer Nature Link
Author	Kitagawa, Hiroyuki Mimura, Naoki Takimura, Kodai Morito, Shigekazu Kikuchi, Kotaro
Copyright Year	2015
Abstract	N-type Cu-doped Bi$_{2}$Te$_{2.85}$Se$_{0.15}$ thermoelectric materials were prepared by pulse-current sintering under cyclic uniaxial pressure, and the effect of the cyclic uniaxial pressure on texture and thermoelectric properties was investigated. Cu$_{ x }$Bi$_{2}$Te$_{2.85}$Se$_{0.15}$ (x = 0−0.03) powder prepared by mechanical alloying was sintered at 673 K using pulse-current heating under 100 MPa of cyclic uniaxial pressure. X-ray diffraction patterns and electron backscattered diffraction analyses showed that the cyclic uniaxial pressure was effective for texture control. The flattened crystal grains were stacked in the thickness direction of the sintered materials and the hexagonal c-plane strongly tended to align in the direction perpendicular to the uniaxial pressure. As a result of this crystal alignment, the electrical resistivity in the direction perpendicular to the uniaxial pressure became smaller than that of equivalent samples prepared with a constant uniaxial pressure. The smaller resistivity led to a larger power factor, and the figure␣of merit was improved by the application of cyclic uniaxial pressure.
Starting Page	1523
Ending Page	1528
Page Count	6
File Format	PDF
ISSN	03615235
Journal	Journal of Electronic Materials
Volume Number	45
Issue Number	3
e-ISSN	1543186X
Language	English
Publisher	Springer US
Publisher Date	2015-10-15
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Bismuth telluride pulse-current sintering texture thermoelectric properties Optical and Electronic Materials Characterization and Evaluation of Materials Electronics and Microelectronics, Instrumentation Solid State Physics
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Electronic, Optical and Magnetic Materials Condensed Matter Physics Electrical and Electronic Engineering

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