http://www.cnr.it/ontology/cnr/individuo/prodotto/ID22344

Thermoelectric Properties of In Situ Formed Bi0.85Sb0.15/Bi-Rich Particles Composite (Articolo in rivista)

Type

Label

Thermoelectric Properties of In Situ Formed Bi0.85Sb0.15/Bi-Rich Particles Composite (Articolo in rivista) (literal)

Anno

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

Alternative label

S. Ceresara, M. Codecasa, F. Passaretti, P. Tome, A. Weidenkaff, C. Fanciulli (2011)
Thermoelectric Properties of In Situ Formed Bi0.85Sb0.15/Bi-Rich Particles Composite
in Journal of electronic materials; Springer Boston, Boston (Stati Uniti d'America)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

S. Ceresara, M. Codecasa, F. Passaretti, P. Tome, A. Weidenkaff, C. Fanciulli (literal)

Pagina inizio

Pagina fine

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

Rivista

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

Note

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

1. CNR-IENI, Corso Promessi Sposi, 29, 23900 Lecco, Italy. / 2. EMPA, Uberlandstrasse, 129, 8600 Dubendorf, Switzerland. (literal)

Titolo

Thermoelectric Properties of In Situ Formed Bi0.85Sb0.15/Bi-Rich Particles Composite (literal)

Abstract

A Bi-15 at.%Sb alloy, homogenized by equal channel angular extrusion (ECAE) at T = 523 K, has been treated just above its solidus temperature, causing segregation of a secondary Bi-rich phase at the grain boundaries. This process results in an in situ composite. The thermoelectric properties of the composite have been measured in the range of 5 K < T < 300 K. The results are compared with those of the homogeneous alloy. The presence of a Bi-rich phase improves the Seebeck coefficient at T < 50 K, and enhances the electrical conductivity by a factor of 1.4 at T = 300 K up to a factor of 3.4 at T = 50 K; unfortunately, the thermal conductivity also increases by about 50% in the same temperature range. As a result, the figure of merit, Z, is slightly suppressed above T = 110 K, but increases at lower temperatures, reaching a peak value of 4.2 x 10(-3) K(-1) at T = 90 K. The power factor considerably increases over the whole temperature range, rendering this material suitable as the n-type leg of a cryogenic thermoelectric generator for cold energy recovery in a liquefied natural gas plant. (literal)

Editore