DocumentCode :
2481324
Title :
Pressureless-sintering and thermoelectric properties of lead selenide ceramics
Author :
Unuma, H. ; Shigetsuka, N. ; Masui, K. ; Ota, T. ; Takahashi, M.
Author_Institution :
Ceramics Res. Lab., Nagoya Inst. of Technol., Japan
fYear :
1998
fDate :
24-28 May 1998
Firstpage :
310
Lastpage :
313
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, PbSeO3, 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
Keywords :
IV-VI semiconductors; ceramics; lead compounds; sintering; thermoelectricity; PbSe; PbSe ceramics; PbSeO3; Seebeck coefficient; electrical conductivity; heavy-metal chalcogenide thermoelectric materials; powder bed; sintering behavior; thermoelectric properties; volatilization; Atmosphere; Ceramics; Chemical technology; Impurities; Laboratories; Lead compounds; Plasma temperature; Powders; Scanning electron microscopy; Thermoelectricity;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Thermoelectrics, 1998. Proceedings ICT 98. XVII International Conference on
Conference_Location :
Nagoya
ISSN :
1094-2734
Print_ISBN :
0-7803-4907-5
Type :
conf
DOI :
10.1109/ICT.1998.740380
Filename :
740380
Link To Document :
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