IMPROVEMENT IN THERMOELECTRIC CHARACTERISTICS OF N-TYPE IRON DISILICIDE BY LOCAL COMPOSITION MODIFICATION

Authors
TOKIAI T UESUGI T KOUMOTO K
Citation
T. Tokiai et al., IMPROVEMENT IN THERMOELECTRIC CHARACTERISTICS OF N-TYPE IRON DISILICIDE BY LOCAL COMPOSITION MODIFICATION, Journal of the American Ceramic Society, 78(4), 1995, pp. 1089-1092
Citations number
10
Categorie Soggetti
Material Science, Ceramics
Journal title
Journal of the American Ceramic Society → ACNP
ISSN journal
00027820
Volume
78
Issue
4
Year of publication
1995
Pages
1089 - 1092
Database
ISI
SICI code
0002-7820(1995)78:4<1089:IITCON>2.0.ZU;2-8
Abstract
High thermoelectric figure of merit semiconducting ceramics of n-type iron disilicide with modified local compositions have been developed. Sintering and annealing of the composite powder composed of iron disil icide and precipitated cobalt (II) hydroxide resulted in the dissoluti on of excess Co and oxygen into the iron disilicide phase. Excess Co s egregated to the grain boundary region, while interstitially incorpora ted oxygen was distributed homogeneously in the microstructure, The ma ximum figure of merit achieved was 5.2 x 10(-4)/K at 673 K.