Journalartikel

The Influence of Synthesis Procedure on the Microstructure and Thermoelectric Properties of p-Type Skutterudite Ce0.6Fe2Co2Sb12


AutorenlisteSesselmann, A.; Skomedal, G.; Middleton, H.; Mueller, E.

Jahr der Veröffentlichung2016

Seiten1397-1407

ZeitschriftJournal of Electronic Materials

Bandnummer45

Heftnummer3

ISSN0361-5235

eISSN1543-186X

DOI Linkhttps://doi.org/10.1007/s11664-015-4046-4

VerlagElectron Devices Society


Abstract
We have investigated p-type skutterudite samples with the nominal composition Ce0.6Co2Fe2Sb12 synthesized from elementary constituents by gas atomization and conventional melting, and also those synthesized from ternary and binary phases such as FexCo(1-x)Sb(2) and CeSb2, respectively, which were mixed and subsequently ball-milled. We conducted measurements of the temperature-dependent transport properties (Seebeck coefficient, thermal/electrical conductivity) and carried out scanning electron microscope analysis, electron probe micro-analysis and powder x-ray diffraction to obtain information about microstructure and elementary distribution of the phases. We show that the presented synthesis methods each possess particular strengths but ultimately, however, lead to different final compositions of the skutterudite phase and secondary phases, which significantly influence the thermoelectric properties of the material. Material prepared using an educt method gave the best thermoelectric properties with a peak ZT of 0.7. Furthermore, we show that even an apparent homogeneous skutterudite area within the material exhibits varying stoichiometry in each grain even though they conform to the solubility range of cerium in this p-type skutterudite. Moreover, we show that marcasite is preferred as an educt over the arsenopyrite phase and discuss the formation of the p-type skutterudite phase with these synthesis techniques.



Zitierstile

Harvard-ZitierstilSesselmann, A., Skomedal, G., Middleton, H. and Mueller, E. (2016) The Influence of Synthesis Procedure on the Microstructure and Thermoelectric Properties of p-Type Skutterudite Ce0.6Fe2Co2Sb12, Journal of Electronic Materials, 45(3), pp. 1397-1407. https://doi.org/10.1007/s11664-015-4046-4

APA-ZitierstilSesselmann, A., Skomedal, G., Middleton, H., & Mueller, E. (2016). The Influence of Synthesis Procedure on the Microstructure and Thermoelectric Properties of p-Type Skutterudite Ce0.6Fe2Co2Sb12. Journal of Electronic Materials. 45(3), 1397-1407. https://doi.org/10.1007/s11664-015-4046-4



Schlagwörter


ARSENOPYRITEBAYFEXCO4-XSB12CEYFEXCO4-XSB12FILLED SKUTTERUDITESMARCASITEperitectic reactionp-Type skutteruditePYRITEtransformation rate


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