|
|
| Type |
Poster Presentation |
| Area |
Material Chemistry |
| Room No. |
Event Hall |
| Time |
4월 20일 (금요일) 11:00~12:30 |
| Code |
MAT.P-487 |
| Subject |
Synthesis and thermoelectric Properties of AgPbBiS3 |
| Authors |
Jaeho Lee, CHUNG IN*
Division of Chemical & Biological Engineering, Seoul National University, Korea
|
| Abstract |
AgPbBiS3 is a member of sulfosalt minerals. It appears to be promising for thermoelectric applications because of its complex chemical composition, high symmetry of cubic structure, and low electronic band gap. However, its pure synthesis and thermoelectric properties have not been well established. In this presentation, we discuss the synthesis of pure phase of AgPbBiS3 by high-temperature solid-state reaction as well as its structural chemistry, spectroscopic analyses, and thermoelectric transport properties such as electrical conductivity, Seebeck coefficient, and thermal conductivity. AgPbBiS3 is a n-type semiconductor with a relatively low band gap at 0.74 eV. It crystallizes in the rock-salt type structure, where Ag, Pb, and Bi atoms are randomly disordered in the cationic site and S atom is exclusively distributed at the anionic site. Such a structural characteristic results in the low lattice thermal conductivity of ~0.67W/mK and consequent a maximum thermoelectric figure of merit ZT of 0.36 at 828K for dense pellelts of AgPbBiS3 prepared by spark plasma sintering. |
| E-mail |
jhl331@snu.ac.kr |
|
121st General Meeting of the KCS