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  • 02월 20일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제113회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Enhanced thermoelectric properties of Ba, In, Yb multiple-filled CoSb3 based skutterudites nanocomposites

2014년 2월 13일 16시 49분 03초
MAT.P-1051 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
4월 16일 (수요일) 16:00~19:00
저자 및
유병규, 김성진1,*
이화여자대학교 화학나노과학, Korea
1이화여자대학교 화학과, Korea
With serious concerns on energy conservation and environmental protection, researches for alternative energy sources other than fossil fuels and various energy conversion technologies have been extensively conducted in recent years. Thermoelectric energy conversion, which have been utilized for power generation and solid-state cooling for several decades, is one of the energy conversion technologies that have received much attention for renewable energy production from waste energy or low-grade energy sources. The energy conversion efficiency of thermoelectric devices depends partly on the non-dimensional figure of merit (ZT) of thermoelectric materials. Numerous works have been done to improve the ZT values of thermoelectric materials. For thermoelectric nanocomposites, improvement of ZT values has been suggested due to decrease in lattice thermal conductivity without adverse effects on electrical resistivity. Among many kinds of materials, filled skutterudites are one of the most promising thermoelectric materials for power generation applications, but has a low figure of merit due to the high thermal conductivity. To solve this problem, filling voids with rare earth atoms is an effective way to lowering thermal conductivity which causes scattering of phonons, necessarily enhances thermoelectric properties of skutterudite compounds. In this study, multiple-filled CoSb3 based skutterudite nanocomposites were synthesized by a combination of melting and high-temperature annealing. The structure and composition of the samples are characterized by using XRD, EDS. Thermoelectric characteristics of the filled-skutterudite nanocomposites were evaluated at a temperature range from room temperature to 873 K as a function of the atomic fraction of filler atoms.