Effect of segregated impurity phases on lattice thermal conductivity in Y-added CoSb3

Three preparation methods - quenching, sintering and annealing - have been employed to synthesize Y-filled skutterudite compounds YxCo4Sbi2 (0.00 < x < 0.35). Y atoms do not fill the vacancy sites in the skutterudite structure in the form of YxCo4Sb12YSb and CoSb2 are formed as impurity phases...

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Published inScripta materialia Vol. 56; no. 4; pp. 269 - 272
Main Authors Nakamoto, Go, Yoshida, Yuima, Van Vu, Le, Huong, Ngo Thu, Anh, Do Thi Kim, Kurisu, Makio
Format Journal Article
LanguageEnglish
Published 01.02.2007
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Summary:Three preparation methods - quenching, sintering and annealing - have been employed to synthesize Y-filled skutterudite compounds YxCo4Sbi2 (0.00 < x < 0.35). Y atoms do not fill the vacancy sites in the skutterudite structure in the form of YxCo4Sb12YSb and CoSb2 are formed as impurity phases when Y is added. The lattice thermal conductivity is reduced by 30% by Y addition, indicating that the segregated impurity phases strongly scatter.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:1359-6462
DOI:10.1016/j.scriptamat.2006.10.023