Comprehensive study of tellurium based glass ceramics for thermoelectric application. (24th October 2015)

• Record Type: Journal Article
• Authors: Cui, S.; Boussard-plédel, C.; Calvez, L.; Rojas, F.; Chen, K.; Ning, H.; Reece, M. J.; Guizouarn, T.; Bureau, B.
• Is Part Of: Advances in applied ceramics. Volume 114(2015)Supplement 1
• Page Start: S42
• Page End: S47
• Publication Date: 2015-10-24
• Subjects: Te based glass -- Glass ceramics -- Spark plasma sintering -- Thermoelectric; Ceramics -- Periodicals; 620.1405
• DOI: 10.1179/1743676115Y.0000000054
• Languages: English
• ISSNs: 1743-6753

Abstract

Abstract : Tellurium based glasses have interesting thermoelectric characteristics. However, their high electrical resistivity is still an obstacle to considering them for thermoelectric applications. In this work, the (Te85 Se15 )60 − 0.6x As40 − 0.4x Cux glass system was studied. This revealed that Cu can act as glass former and increase both glass thermal stability and electrical conductivity. The best candidate, (Te85 Se15 )45 As30 Cu25, was chosen to prepare composites with Bi0.5 Sb1.5 Te3 using spark plasma sintering. These glass ceramic samples exhibited a much better thermoelectric performance. Glass ceramics with 50 mol. % of Bi0.5 Sb1.5 Te3 show a maximum ZT value equal to 0.37 at 413 K. Meanwhile, the advantages of glass including low sintering temperature and high formability are well maintained.