학술논문
Pressureless-sintering and thermoelectric properties of lead selenide ceramics
Document Type
Conference
Author
Source
Seventeenth International Conference on Thermoelectrics. Proceedings ICT98 (Cat. No.98TH8365) Thermoelectrics Thermoelectrics, 1998. Proceedings ICT 98. XVII International Conference on. :310-313 1998
Subject
Language
ISSN
1094-2734
Abstract
As an attempt to establish pressureless-sintering technique of heavy-metal chalcogenide thermoelectric materials; sintering behavior and thermoelectric properties of PbSe ceramics were investigated. Under appropriate sintering conditions, sintered densities higher than 97% of theoretical density were attained. The volatilization of the components was effectively suppressed by the use of a powder bed and the optimization of sintering temperature and time. Although an oxide phase, PbSeO/sub 3/, was contained in the starting powder, it was eliminated by sintering powder compacts under a reducing atmosphere. The electrical conductivity increased with increasing sintering temperature, while Seebeck coefficient was not much dependent on the sintering conditions. Potential superiority of pressureless-sintering technique to pressure-sintering techniques such as hot-pressing was evidenced in terms of obtaining oxide-free, highly dense thermoelectric ceramics.