| 학회 | 한국공업화학회 |
| 학술대회 | 2018년 가을 (10/31 ~ 11/02, 제주국제컨벤션센터(ICC JEJU)) |
| 권호 | 22권 2호 |
| 발표분야 | 무기재료_포스터 |
| 제목 | Synthesis and thermoelectric properties of quaternary sulfosalt AgPbBiS3 |
| 초록 | Quaternary chalcogenide AgPbBiS3, a member of sulfosalt minerals, appears to be promising for thermoelectric applications due to its complex chemical composition and high symmetry of cubic structure. However, its pure synthesis and thermoelectric properties have not been studied. In this presentation, we report the pure synthesis of AgPbBiS3 by high-temperature solid-state reaction, its structural chemistry, spectroscopic analyses, and thermoelectric properties. AgPbBiS3 crystallizes in the rock-salt structure. Ag, Pb, and Bi atoms are disordered randomly in the cationic site and S atom is located at the anionic site. This structural characteristic results in the remarkably low thermal conductivity of ~0.67W/mK. It is an n-type semiconductor with a relatively low energy band gap at 0.74 eV. Dense pellets of spark plasma sintered AgPbBiS3 show maximum thermoelectric figure of merit ZT of 0.36 at 823K. |
| 저자 | 이재호, 정인 |
| 소속 | 서울대 |
| 키워드 | thermoelectric; synthesis; sulfosalt; AgPbBiS3; solid-state reaction |
