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Ag9TlTe5 and AgTlTe: high ZT materials with extremely low thermal conductivity

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5 Author(s)
Kurosaki, Ken ; Graduate Sch. of Eng., Osaka Univ., Japan ; Kosuga, Atsuko ; Goto, Keita ; Muta, Hiroaki
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We have studied the thermoelectric properties Ag9TlTe5 and AgTlTe. The thallium compounds have extremely low thermal conductivities around 0.25 Wm-1K-1 from room temperature to about 700 K. The thallium compounds indicate very high ZT values; especially the highest ZT value of Ag9TlTe5 is 1.23 obtained at 700 K. Ag9TlTe5 is a unique material combining extremely low thermal conductivity and relatively low electrical resistivity.

Published in:

Thermoelectrics, 2005. ICT 2005. 24th International Conference on

Date of Conference:

19-23 June 2005