NDLI: Effects of PbS doping on thermal conductivity of n-type CoSb/sub 3/

Content Provider	IEEE Xplore Digital Library
Author	Anno, H. Tashiro, H. Kaneko, H. Matsubara, K.
Copyright Year	1998
Description	Author affiliation: Sci. Univ. of Tokyo, Japan (Anno, H.)
Abstract	Additional PbS doping of heavily doped n-type Co/sub 1-x/M/sub x/Sb/sub 3/ (M=Pd/Pt) has been studied to reduce the thermal conductivity of the material. Although the heavily doped n-type material has good electrical properties, the thermal conductivity is relatively high (about 0.06 W cm/sup -1/ K/sup -1/). If PbS particles are dispersed throughout the host material, they can be expected to act as phonon scattering centers. Polycrystalline samples were prepared by hot pressing or spark plasma sintering the admixture of Co/sub 1-x/M/sub x/Sb/sub 3/ (M=Pd/Pt) and PbS fine powders. Samples were characterized by X-ray diffraction, electron probe microanalysis, and optical microscope observation. Measurements of the electrical conductivity, the Hall coefficient, the Seebeck coefficient, and the thermal conductivity were performed to study the influence of PbS doping on the electrical and thermoelectrical properties. It was found that PbS particles were uniformly dispersed throughout Co/sub 1-x/M/sub x/Sb/sub 3/ (M=Pd/Pt) host without any decomposition. About 30% reduction of the thermal conductivity can be achieved by additional PbS doping, keeping good electrical properties. This can be attributed to the phonon scattering effect of PbS particles. As a result, the thermoelectric figure of merit of the material increases to more than 1/spl times/10/sup -3/ K/sup -1/.
Starting Page	326
Ending Page	329
File Size	455092
Page Count	4
File Format	PDF
ISBN	0780349075
ISSN	10942734
DOI	10.1109/ICT.1998.740386
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-05-28
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Thermal conductivity Doping Conducting materials Optical scattering Phonons Particle scattering X-ray scattering Plasma measurements Optical microscopy Thermoelectricity
Content Type	Text
Resource Type	Article

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