| 학회 |
한국재료학회 |
| 학술대회 |
2019년 가을 (10/30 ~ 11/01, 삼척 쏠비치 호텔&리조트) |
| 권호 |
25권 2호 |
| 발표분야 |
A. 전자/반도체 재료 분과 |
| 제목 |
Enhancement of thermoelectric properties of In-single-filled Co4Sb12-based Skutterudite by process modification |
| 초록 |
In this study, the effects of the cooling rate on the microstructure and the thermoelectric properties of In-single-filled Co4Sb12-based Skutterudite were investigated. The samples with In-filled Co4Sb12 were first melted by induction melting method, and then the melted ingots were transferred to second melting step using melt-spinning technique. Herein, the cooling rate of liquid-phase was controlled by the Cu wheel rotation speed between 1000 rpm (~13m/s) and 4000 rpm (52.4 m/s) during melt-spinning process with the aim of controlling the characteristic size of nanostructure in melt-spun ribbons, which could strongly affect to the charge and phonon transport properties of the material. The melt-spun ribbons were consolidated using spark plasma sintering, and the microstructure, the temperature dependent thermoelectric properties were characterized. As a result, the ZT values of the bulk samples prepared from 1000-4000 rpm had no significant change at low temperature, a pronounced change in ZT value is observed at high temperature, which reached a maximum of 1.35 at 763K for the sample prepared from the 2000 rpm melt-spun ribbons. |
| 저자 |
Nguyen Van Du1, Jamil Ur Rahman1, Soonil Lee2, Jung Young Cho1, Won-Seon Seo1, Woo Hyun Nam1, Weon Ho Shin3
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| 소속 |
1한국세라믹기술원, 2창원대, 3광운대 |
| 키워드 |
thermoelectric; Skutterudite; melt-spinning; nanostructure; charge and phonon transport
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| E-Mail |
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