High-pressure synthesis and the structure refinement of CoSb3-based filled-skutterudites

Hirotsugu Takizawa; Masayuki Ito; Kyota Uheda; Tadashi Endo

doi:10.2497/jjspm.46.1113

High-pressure synthesis and the structure refinement of CoSb₃-based filled-skutterudites

Hirotsugu Takizawa, Masayuki Ito, Kyota Uheda, Tadashi Endo

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Research output: Contribution to journal › Article › peer-review

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Abstract

Various 14-group elements were inserted in the skutterudite-type CoSb₃ host lattice under high-pressure and temperature conditions of 8 GPa and 550 °C using the Belt-type high-pressure equipment. It was found that various elements could be inserted in the body-centered vacant site, resulting in the formation of new filled-skutterudites M_xCo₄Sb₁₂ (M: Ge, Sn, Pb). The composition and the degree of space-filling were determined by the Rietveld analysis and the density measurements. Maximum space-filling was determined to be 50% for M = Ge, 100% for M = Sn, and 70% for M = Pb. The inserted Sn atom shows anomalous large thermal vibration amplitude, while Pb atom does not. The Ge atom locates the position slightly deviated from the ideal body-centered position.

Original language	English
Pages (from-to)	1113-1117
Number of pages	5
Journal	Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume	46
Issue number	10
DOIs	https://doi.org/10.2497/jjspm.46.1113
Publication status	Published - 1999 Oct

ASJC Scopus subject areas

Mechanical Engineering
Industrial and Manufacturing Engineering
Metals and Alloys
Materials Chemistry

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abstract = "Various 14-group elements were inserted in the skutterudite-type CoSb3 host lattice under high-pressure and temperature conditions of 8 GPa and 550 °C using the Belt-type high-pressure equipment. It was found that various elements could be inserted in the body-centered vacant site, resulting in the formation of new filled-skutterudites MxCo4Sb12 (M: Ge, Sn, Pb). The composition and the degree of space-filling were determined by the Rietveld analysis and the density measurements. Maximum space-filling was determined to be 50% for M = Ge, 100% for M = Sn, and 70% for M = Pb. The inserted Sn atom shows anomalous large thermal vibration amplitude, while Pb atom does not. The Ge atom locates the position slightly deviated from the ideal body-centered position.",

author = "Hirotsugu Takizawa and Masayuki Ito and Kyota Uheda and Tadashi Endo",

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AU - Takizawa, Hirotsugu

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AU - Endo, Tadashi

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