Muthiah, Saravanan and Pulikkotil, Jiji and Srivastava, A. K. and Kumar, Ashok and Pathak, B. D and Dhar, Ajay and Budhani, R. C. (2013) Conducting grain boundaries enhancing thermoelectric performance in doped Mg2Si. Applied Physics Letters, 103 (5). 053901-053906. ISSN 0003-6951

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Abstract

The thermoelectric properties of Pb doped Mg2Si, synthesized using reactive sintering employing spark plasma sintering, are investigated and are compared with other dopants reported in literature. While a moderate decrease in Seebeck coefficient and thermal conductivity is observed for 2 at.% of Pb doping in Mg2Si, a substantial enhancement in the material's thermoelectric figure-of-merit is observed, which is due to an enormous increase in its electrical conductivity. A brick-layer model is proposed to explain these results, wherein the inter-granular electronic conductivity is facilitated by Pb (or Mg2Pb) phases at grain boundaries, which is supported by microstructural evidences.

Item Type:	Article
Additional Information:	copyright for this article belongs to M/s American Institute of Physics
Subjects:	Applied Physics/Condensed Matter
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	19 Aug 2026 10:25
Last Modified:	19 Aug 2026 10:25
URI:	https://npl.csircentral.net/id/eprint/3308

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