P-type thermoelectric materials, a process for their...

Details P-type thermoelectric materials, a process for their... P-type thermoelectric materials, a process for their...

2011-08-23

2011-08-23

Koslow, C. Melissa (Department: 1734)

Compositions

Barrier layer device compositions

Group iii element containing binary compound; e.g., ga, as

C252S06230C, C252S06230Q, C136S201000, C136S240000, C136S239000

Reexamination Certificate

active

08003002

ABSTRACT:
A thermoelectric material of the p-type having the stoichiometric formula Zn4Sb3, wherein part of the Zn atoms optionally being substituted by one or more elements selected from the group comprising Sn, Mg, Pb and the transition metals in a total amount of 20 mol % or less in relation to the Zn atoms is provided by a process involving zone-melting of a an arrangement comprising an interphase between a “stoichiometric” material having the desired composition and a “non-stoichiometric” material having a composition deviating from the desired composition. The thermoelectric materials obtained exhibit excellent figure of merits.

REFERENCES:
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patent: 2003-138327 (2003-05-01), None
patent: 2005-005675 (2005-01-01), None
patent: WO 02/089224 (2002-11-01), None
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Tapiero et al.;Preparation and Characterization of ZN4SB3; Journal of Solar Energy Materials; Sep.-Oct. 1985; Netherlands; XP-002337520 (Abstract).
Koyanagi et al.;Thermoelectric Properties of beta-ZN4SB3 Doped with Sn; Proceedings of IEEE International Conf on Thermoelectrics; 1997 XP-002337521 (Abstract).
Caillat et al.;ZN-Sb Alloys for Thermoelectric Power Generation; Proceedings of 31stIntersociety Conference on Energy Conversion Engineering; Aug. 11-16, 1996 (Abstract).
Zhu et al.;Transport Properties of Beta-ZN4SB3 prepared by Vacuum Melting; published in Journal of Zhejiang University, PR of China (Abstract).
Zhang et al.;Effects of ZNSB and ZN Inclusions on the Thermoelectric Properties of Beta-ZN4SB3; Journal of Alloys and Compounds 358 (2003) pp. 252-256.
Record et al.;Phase Transformations in the Zn-Cd-Sb System; Intermetallics 11 (2003) pp. 1189-1194.
Pedersen et al.: “Thermally stable thermoelectric Zn4Sb3 by zone-melting synthesis”, Applied Physics Letters 92, 161907 (2008).
Pedersen et al.: Cd Substitution in MxZn4-xSb3: Effect on Thermal Stability, Crystal Structure, Phase Transitions, and Thermoelectric Performance, Chemistry of Materials, pp. 2375-2383 (2010).

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