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나노 분말을 Spark Plasma 소결해 제조한 PbTe의 열전 특성 KCI 등재

Thermoelectric Properties of PbTe Prepared by Spark Plasma Sintering of Nano Powders

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한국분말야금학회지 (Journal of Korean Powder Metallurgy Institute)
한국분말재료학회(구 한국분말야금학회) (Korean Powder Metallurgy Institute)
초록

Nanoparticles of PbTe are prepared via chemical reaction of the equimolar aqueous solutions of Pb(CH3COO)2 and Te at 120°C. The size of the obtained particles is 100 nm after calcination in a hydrogen atmosphere. Dense specimens for the thermoelectric characterization are produced by spark plasma sintering of prepared powders at 400°C to 500°C under 80 MPa for 5 min. The relative densities of the prepared specimens reach approximately 97% and are identified as cubic based on X-ray diffraction analyses. The thermoelectric properties are evaluated between 100°C and 300°C via electrical conductivity, Seebeck coefficient, and thermal conductivity. Compared with PbTe ingot, the reduction of the thermal conductivities by more than 30% is verified via phonon scattering at the grain boundaries, which thus contributes to the increase in the figure of merit.

목차
Abstract
 1. 서 론
 2. 실험 방법
  2.1. 나노 PbTe 분말 제조
  2.2. PbTe 소결
  2.3. 특성평가
 3. 결과 및 고찰
 4. 결 론
 References
저자
  • 전은영(엘앤에프) | Eun-Young Jun (L&F Co. ltd.)
  • 김호영(DGIST) | Ho-Young Kim (Magnet Controlled Materials Research Group, DGIST)
  • 김 참(DGIST) | Cham Kim (Magnet Controlled Materials Research Group, DGIST)
  • 오경식(국립안동대학교 신소재공학부, 친환경신소재산업지원센터) | Kyung-Sik Oh (School of Advanced Materials Engineering, Industrial Technology Center for Environment-friendly Materials, Andong National University)
  • 정태주(국립안동대학교 신소재공학부, 친환경신소재산업지원센터) | Tai-Joo Chung (School of Advanced Materials Engineering, Industrial Technology Center for Environment-friendly Materials, Andong National University) Corresponding Author