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Synthesis of New Thermoelectric Materials Using Modulated Elementary Reactants

Published online by Cambridge University Press:  10 February 2011

Heike Sellinschegg ,
Joshua R. Williams ,
Steven P. Maxwell ,
Douglas Sillars  and
David C. Johnson
Heike Sellinschegg
Affiliation:
Department of Chemistry and Materials Science Institute University of Oregon, Eugene, OR, 97403, [email protected]
Joshua R. Williams
Affiliation:
Department of Chemistry and Materials Science Institute University of Oregon, Eugene, OR, 97403, [email protected]
Steven P. Maxwell
Affiliation:
Department of Chemistry and Materials Science Institute University of Oregon, Eugene, OR, 97403, [email protected]
Douglas Sillars
Affiliation:
Department of Chemistry and Materials Science Institute University of Oregon, Eugene, OR, 97403, [email protected]
David C. Johnson
Affiliation:
Department of Chemistry and Materials Science Institute University of Oregon, Eugene, OR, 97403, [email protected]
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Abstract

Modulated elemental reactants have been used to synthesize metastable ternary compounds with the skutterudite crystal structure. The initial reactants are made up of multiple repeats of a unit containing elemental layers of a ternary metal, iron or cobalt (or a combination of these two) and antimony. The elemental layers interdiffuse upon low temperature annealing and form amorphous reaction intermediates. In this paper we target the compounds PbxFe4−yCoySb12. On annealing at temperatures between 12° and 150° C (depending on the composition) crystallization of the skutterudite structure occurs. The compounds are only kinetically stable, decomposing into a mixture of binary compounds upon annealing past a temperature of about 600°C. Preliminary data for the Seebeck coefficient and the electrical conductivity was collected The thermoelectric properties of the lead cobalt antimony skutterudite - films were measured as a function of lead occupancy.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 545: Symposium Z – Thermoelectric Materials 1998 - The Next Generation… , 1998 , 53
Copyright
Copyright © Materials Research Society 1999

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References

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