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Title: Thermoelectric properties of Ag-doped n-type (Bi{sub 2}Te{sub 3}){sub 0.9}-(Bi{sub 2-} {sub x} Ag {sub x} Se{sub 3}){sub 0.1} (x=0-0.4) alloys prepared by spark plasma sintering

Abstract

Ag-doped n-type (Bi{sub 2}Te{sub 3}){sub 0.9}-(Bi{sub 2-} {sub x} Ag {sub x} Se{sub 3}){sub 0.1} (x=0-0.4) alloys were prepared by spark plasma sintering and their physical properties evaluated. When at low Ag content (x=0.05), the temperature dependence of the lattice thermal conductivity follows the trend of (Bi{sub 2}Te{sub 3}){sub 0.9}-(Bi{sub 2}Se{sub 3}){sub 0.1}; while at higher Ag content, a relatively rapid reduction above 400 K can be observed due possibly to the enhancement of scattering of phonons by the increased defects. The Seebeck coefficient increases with Ag content, with some loss of electrical conductivity, but the maximum dimensionless figure of merit ZT can be obtained to be 0.86 for the alloy with x=0.4 at 505 K, about 0.2 higher than that of the alloy (Bi{sub 2}Te{sub 3}){sub 0.9}-(Bi{sub 2}Se{sub 3}){sub 0.1} without Ag-doping. - Graphical abstract: The temperature dependence of dimensionless thermoelectric figure of merit ZT for different (Bi{sub 2}Te{sub 3}){sub 0.9}-(Bi{sub 2-} {sub x} Ag {sub x} Se{sub 3}){sub 0.1} (x=0-0.4) alloys prepared by spark plasma sintering.

Authors:
 [1];  [2];  [3];  [2];  [3];  [4];  [4];  [5]
  1. School of Mechanical Engineering, Ningbo University of Technology, Ningbo 315016 (China), E-mail: cuijl@nbip.net
  2. School of Mechanical Engineering, Ningbo University of Technology, Ningbo 315016 (China)
  3. (China)
  4. School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221008 (China)
  5. College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014 (China)
Publication Date:
OSTI Identifier:
21015759
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 180; Journal Issue: 3; Other Information: DOI: 10.1016/j.jssc.2006.12.010; PII: S0022-4596(06)00649-9; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; BISMUTH ALLOYS; CRYSTAL DEFECTS; DOPED MATERIALS; ELECTRIC CONDUCTIVITY; PLASMA; SELENIUM ALLOYS; SILVER ALLOYS; SINTERING; TELLURIUM ALLOYS; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0400-1000 K; THERMAL CONDUCTIVITY; THERMOELECTRIC PROPERTIES

Citation Formats

Cui, J.L., Xiu, W.J., School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221008, Mao, L.D., College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014, Ying, P.Z., Jiang, L., and Qian, X. Thermoelectric properties of Ag-doped n-type (Bi{sub 2}Te{sub 3}){sub 0.9}-(Bi{sub 2-} {sub x} Ag {sub x} Se{sub 3}){sub 0.1} (x=0-0.4) alloys prepared by spark plasma sintering. United States: N. p., 2007. Web. doi:10.1016/j.jssc.2006.12.010.
Cui, J.L., Xiu, W.J., School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221008, Mao, L.D., College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014, Ying, P.Z., Jiang, L., & Qian, X. Thermoelectric properties of Ag-doped n-type (Bi{sub 2}Te{sub 3}){sub 0.9}-(Bi{sub 2-} {sub x} Ag {sub x} Se{sub 3}){sub 0.1} (x=0-0.4) alloys prepared by spark plasma sintering. United States. doi:10.1016/j.jssc.2006.12.010.
Cui, J.L., Xiu, W.J., School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221008, Mao, L.D., College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014, Ying, P.Z., Jiang, L., and Qian, X. Thu . "Thermoelectric properties of Ag-doped n-type (Bi{sub 2}Te{sub 3}){sub 0.9}-(Bi{sub 2-} {sub x} Ag {sub x} Se{sub 3}){sub 0.1} (x=0-0.4) alloys prepared by spark plasma sintering". United States. doi:10.1016/j.jssc.2006.12.010.
@article{osti_21015759,
title = {Thermoelectric properties of Ag-doped n-type (Bi{sub 2}Te{sub 3}){sub 0.9}-(Bi{sub 2-} {sub x} Ag {sub x} Se{sub 3}){sub 0.1} (x=0-0.4) alloys prepared by spark plasma sintering},
author = {Cui, J.L. and Xiu, W.J. and School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221008 and Mao, L.D. and College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014 and Ying, P.Z. and Jiang, L. and Qian, X.},
abstractNote = {Ag-doped n-type (Bi{sub 2}Te{sub 3}){sub 0.9}-(Bi{sub 2-} {sub x} Ag {sub x} Se{sub 3}){sub 0.1} (x=0-0.4) alloys were prepared by spark plasma sintering and their physical properties evaluated. When at low Ag content (x=0.05), the temperature dependence of the lattice thermal conductivity follows the trend of (Bi{sub 2}Te{sub 3}){sub 0.9}-(Bi{sub 2}Se{sub 3}){sub 0.1}; while at higher Ag content, a relatively rapid reduction above 400 K can be observed due possibly to the enhancement of scattering of phonons by the increased defects. The Seebeck coefficient increases with Ag content, with some loss of electrical conductivity, but the maximum dimensionless figure of merit ZT can be obtained to be 0.86 for the alloy with x=0.4 at 505 K, about 0.2 higher than that of the alloy (Bi{sub 2}Te{sub 3}){sub 0.9}-(Bi{sub 2}Se{sub 3}){sub 0.1} without Ag-doping. - Graphical abstract: The temperature dependence of dimensionless thermoelectric figure of merit ZT for different (Bi{sub 2}Te{sub 3}){sub 0.9}-(Bi{sub 2-} {sub x} Ag {sub x} Se{sub 3}){sub 0.1} (x=0-0.4) alloys prepared by spark plasma sintering.},
doi = {10.1016/j.jssc.2006.12.010},
journal = {Journal of Solid State Chemistry},
number = 3,
volume = 180,
place = {United States},
year = {Thu Mar 15 00:00:00 EDT 2007},
month = {Thu Mar 15 00:00:00 EDT 2007}
}
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