Thermoelectric Properties of Half-Heusler Bismuthides ZrCo1−xNixBi (x = 0.0 to 0.1) View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2007-06-09

AUTHORS

V. Ponnambalam, Bo Zhang, Terry M. Tritt, S. Joseph Poon

ABSTRACT

The usefulness of half-Heusler (HH) alloys as thermoelectrics has been mainly limited by their relatively large thermal conductivity, which is a key issue despite their high thermoelectric power factors. In this regard, Bi-containing half-Heusler alloys are particularly appealing, because they are, potentially, of low thermal conductivity. One such a material is ZrCoBi. We prepared pure and Ni-doped ZrCoBi by a solid-state reaction. To evaluate thermoelectric potential we measured electrical resistivity (ρ = 1/σ) and thermopower (σ) up to 1000 K and thermal conductivity (κ) up to 300 K. Our measurements indicate that for these alloys resistivity of approximately a few mΩ cm and thermopower larger than a hundred µV K−1 are possible. Low κ values are also possible. On the basis of these data we conclude that this system has a potential to be optimized further, despite the low power factors (α2σT) we have currently measured. More... »

PAGES

732-735

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s11664-007-0153-1

DOI

http://dx.doi.org/10.1007/s11664-007-0153-1

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1018702717


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