Thermal Conductivity Reduction by Tuning the Rattler Fraction in a p-type CeyYb1-yFe3CoSb12 Double-filled Skutterudite
DC Field | Value | Language |
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dc.contributor.author | Woo, Ho Yoon | - |
dc.contributor.author | Son, Geonsik | - |
dc.contributor.author | Lee, Kyu-Mann | - |
dc.contributor.author | Choi, Soon-Mok | - |
dc.contributor.author | Kim, Hyun-Sik | - |
dc.contributor.author | Seo, Won-Seon | - |
dc.contributor.author | Kim, Sunuk | - |
dc.date.available | 2021-03-17T06:49:34Z | - |
dc.date.created | 2021-02-26 | - |
dc.date.issued | 2020-10 | - |
dc.identifier.issn | 0374-4884 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/11526 | - |
dc.description.abstract | The rattling effect has been a major research topic in attempts to reduce high-frequency phonon conduction, especially for the skutterudite system. Filling skutterudite with rattler atoms with different localized frequencies (double-filling) has also been reported as an effective method to decrease the thermal conductivity. Optimization research for the double rattler effect is required, especially in the p-type R1-yR ' yFexCo4-xSb12 double-filled skutterudite system (R, R ' = rare earth rattlers) because these need larger numbers of rattlers (approximate to 1.0) than are needed in the n-type skutterudite case (approximate to 0.3). We attempted to optimize the rattler fraction in a p-type CeyYb1-yFe3CoSb12 skutterudite system in this research. We combined a melt spinning (MS) process with a subsequent spark plasma sintering (SPS) technique to fabricate bulk nanocrystalline skutterudites. The resulting low thermal conductivity (2.20 Wm(-1)K(-1) at 723 K) and higher electrical conductivity (912 ohm(-1)cm(-2) at 723 K) of this Ce0.6Yb0.4Fe3CoSb12 double-filled system makes the maximum dimensionless figure-of-merit (ZT, 0.90 at 723 K) in the double-filled specimen higher than those in the single-filled skutterudite systems (YbyFe3CoSb12, and CeyFe3CoSb12) previously reported by us. We found that filling with the Ce4+-rattler was more effective than filling with the Yb2+ for reducing the lattice thermal conductivity in the Ce-y Yb1-yFe3CoSb12 double-filler system. The Yb2+-filler effectively increased the electrical conductivity of the p-type Fe3CoSb12 filled skutterudite by modifying the carrier concentration. | - |
dc.publisher | KOREAN PHYSICAL SOC | - |
dc.title | Thermal Conductivity Reduction by Tuning the Rattler Fraction in a p-type CeyYb1-yFe3CoSb12 Double-filled Skutterudite | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Kim, Hyun-Sik | - |
dc.identifier.doi | 10.3938/jkps.77.667 | - |
dc.identifier.scopusid | 2-s2.0-85094203787 | - |
dc.identifier.wosid | 000582895900007 | - |
dc.identifier.bibliographicCitation | JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.77, no.8, pp.667 - 672 | - |
dc.relation.isPartOf | JOURNAL OF THE KOREAN PHYSICAL SOCIETY | - |
dc.citation.title | JOURNAL OF THE KOREAN PHYSICAL SOCIETY | - |
dc.citation.volume | 77 | - |
dc.citation.number | 8 | - |
dc.citation.startPage | 667 | - |
dc.citation.endPage | 672 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.description.journalRegisteredClass | kci | - |
dc.relation.journalResearchArea | Physics | - |
dc.relation.journalWebOfScienceCategory | Physics, Multidisciplinary | - |
dc.subject.keywordAuthor | Thermoelectric | - |
dc.subject.keywordAuthor | Skutterudite | - |
dc.subject.keywordAuthor | Double filling | - |
dc.subject.keywordAuthor | p-type | - |
dc.subject.keywordAuthor | Thermal conductivity | - |
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