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Structural and magnetic properties of (In1−xFex)2O3 (0.0<=x<=0.25) system: Prepared by gel combustion method
(In1−xFex)2O3 polycrystalline samples with x=(0.0,0.05,0.10,0.15,0.20,  and  0.25) have been synthesized by a gel combustion method. Reitveld refinement analysis of x-ray dif...
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Thermoelectric property studies on bulk TiOx with x from 1 to 2

Appl. Phys. Lett. 91, 052505 (2007); doi:10.1063/1.2767775

Published 1 August 2007

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Qinyu He
Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467

Qing Hao and Gang Chen
Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139

Bed Poudel, Xiaowei Wang, Dezhi Wang, and Zhifeng Ren
Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467
100% dense bulk TiOx samples have been made by first oxidizing TiO and then direct current induced hot press. It was found that the Seebeck coefficients are negative at room temperature and change to positive at higher temperature for 1<x<1.25, positive at room temperature and change to negative at higher temperature for 1.25<x<5/3, and always negative up to 800  °C for 5/3<x<2. The highest achieved dimensionless figure of merit is about 0.2–0.23 for 1.83<x<1.9, about eight times lower than the reported value. ©2007 American Institute of Physics
History: Received 31 May 2007; accepted 10 July 2007; published 1 August 2007
Permalink: http://link.aip.org/link/?APPLAB/91/052505/1
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KEYWORDS and PACS

Keywords
PACS
  • 72.20.Pa
    Thermoelectric and thermomagnetic effects (semiconductors/insulators)
  • 72.20.Jv
    Charge carriers: generation, recombination, lifetime, and trapping (semiconductors/insulators)
  • 72.80.Sk
    Electrical conductivity of insulators
  • 81.20.Ev
    Powder processing including powder metallurgy, compaction, sintering, mechanical alloying, and granulation
  • YEAR: 2007

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PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
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