NDLI: Thermoelectric figure of merit of impurity doped and hot-pressed magnesium silicide elements

Content Provider	IEEE Xplore Digital Library
Author	Kajikawa, T. Shida, K. Shiraishi, K. Ito, T. Omori, M. Hirai, T.
Copyright Year	1998
Description	Author affiliation: Shonan Inst. of Technol., Fujisawa, Japan (Kajikawa, T.)
Abstract	Intermetallic magnesium compounds and their solid solutions have been known as potentially promising thermoelectric materials for the middle temperature power generation application. Spark plasma sintering and subsequent hot-pressing were used to make the impurity doped Mg/sub 2/Si thermoelectric elements. The temperature dependence of thermoelectric properties such as the Seebeck coefficient, electrical conductivity and thermal conductivity was measured to clarify the optimum performance of sintered Mg/sub 2/Si elements. Moreover, the semiconducting properties such as Hall mobility and carrier concentration were measured by the van der Pauw method. In the case of 0.6 at%Sb doped n-type sintered elements the maximum power factor was obtained 3.0/spl times/10/sup -3/ W/mK/sup 2/ at 773 K and the figure of merit was 0.87/spl times/10/sup -3/ K/sup -1/ and dimensionless figure of merit ZT was 0.67. Concerning p-type Mg/sub 2/Si elements, silver doped, sintered Mg/sub 2/Si was made by the same procedure as n-type antimony doped sintered elements. The junction of a Mg/sub 2/Si element with the electrode was also studied to check the junction resistance between the thermoelectric element and the electrode. It was found that Fe was suitable as an electrode.
Starting Page	362
Ending Page	369
File Size	678775
Page Count	8
File Format	PDF
ISBN	0780349075
ISSN	10942734
DOI	10.1109/ICT.1998.740395
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	Thermoelectricity Impurities Thermal conductivity Electrodes Plasma temperature Plasma measurements Intermetallic Magnesium compounds Solids Conducting materials
Content Type	Text
Resource Type	Article

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