산화물을 이용한 Bi-Sb-Te계 열전분말 합성
- Alternative Title
- Synthesis of Bi-Sb-Te-system thermoelectric powder using oxide powders as a raw material
- Abstract
- The present study focused on the synthesis of a Bi-Sb-Te-based thermoelectric powder by a oxide-reduction process. The phase structure, particle size of the synthesized powders were analized using XRD and SEM. The synthesized powder was sintered by the spark plasma sintering method. The thermoelectric property of the sintered body was evaluated by measuring the Seebeck coefficient, specific electric resistivity and thermal conductivity. The Bi0.5Sb1.5Te3 had been synthesized by a combination of mechanical milling, calcination and reduction process using mixture of Bi2O3, Sb2O3 and TeO2 powders. The sintered body of the Bi0.5Sb1.5Te3 powder synthesized by a oxide-reduction process showed p-type thermoelectric characteristics, and it had similar value of the figure of merit (ZT) at room temperature with one of the conventional Bi-Sb-Te-system thermoelectric material.
- Issued Date
- 2011
- Awarded Date
- 2011. 2
- Type
- Dissertation
- Keyword
- Thermoelectric Bi-Sb-Te Oxide
- Publisher
- 부경대학교
- Alternative Author(s)
- Kim, Sung Hyun
- Affiliation
- 부경대학교 대학원
- Department
- 대학원 소재프로세스공학과
- Advisor
- 이길근
- Table Of Contents
- 1. 서론 1
2. 이론적 배경 6
2.1 열전현상 6
2.1.1 Seebeck 효과 6
2.1.2 Peltier 효과 9
2.2 열전성능의 최적화 12
2.3 Bi-Te계 열전재료 15
2.3.1 Bi2Te3 열전재료 15
2.3.2 연구동향 17
2.3.3 제조방법 21
3. 실험방법 23
3.1 Bi-Sb-Te계 열전분말 합성 23
3.2 Bi-Sb-Te계 열전분말 소결 24
3.3 Bi-Sb-Te계 소결체의 열전특성평가 24
4. 결과 및 고찰 27
4.1 Bi-Sb-Te계 열전분말 합성 27
4.1.1 밀링이 Bi-Sb-Te계 합금분말 형성에 미치는 영향 27
4.1.2 복산화물 형성이 Bi-Sb-Te계 합금분말 형성에 미치는 영향 32
4.1.3 Bi0.5Sb1.5Te3 합금분말 형성에 미치는 환원공정변수의 영향 36
4.2 Bi-Sb-Te계 소결체의 열전특성 41
4.2.1 열전특성에 미치는 환원온도의 영향 41
4.2.2 열전특성에 미치는 환원시간의 영향 51
5. 결론 60
6. 참고문헌 61
- Degree
- Master
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