The synthesis of CaZn2Sb2 and its thermoelectric properties

Dan Stark, G. J. Snyder

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

CaZn2Sb2 was prepared and examined for use as a high temperature thermoelectric material. It has a high Seebeck coefficient and high electrical conductivity-comparable to β- Zn4Sb3.[1] These two properties are vital in determining the ability of the compound to change heat into electricity isentropically. The dimensionless figure of merit, ZT, a measure of the thermoelectric material's efficiency is defined as ZT = S2σT/λ where S is the Seebeck coefficient, Z the figure of merit, T the temperature, σ the electrical conductivity, and λ the thermal conductivity. However, due to its simple structure, CaZn2Sb2has high λ Doping CaZn2Sb2 with Ga3+ or modifying the (Ca, Zn) to Sb ratio was also investigated. Samples were prepared from Zn, Sb, and the binary compound CaSb2. They were tested for material composition, structure, and thermoelectric properties. Results of this experiment are presented and discussed as are the applicability of these materials to future thermoelectric use. Conservative estimates show a ZT of 5 at 500°C; CaZn2Sb2 could be a good thermoelectric to use at temperatures above 400°C.

Original languageEnglish (US)
Title of host publicationProceedings ICT 2002
Subtitle of host publication21st International Conference on Thermoelectrics
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages181-184
Number of pages4
ISBN (Electronic)0780376838
DOIs
StatePublished - Jan 1 2002
Externally publishedYes
Event21st International Conference on Thermoelectrics, ICT 2002 - Long Beach, United States
Duration: Aug 25 2002Aug 29 2002

Publication series

NameInternational Conference on Thermoelectrics, ICT, Proceedings
Volume2002-January

Other

Other21st International Conference on Thermoelectrics, ICT 2002
CountryUnited States
CityLong Beach
Period8/25/028/29/02

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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    Stark, D., & Snyder, G. J. (2002). The synthesis of CaZn2Sb2 and its thermoelectric properties. In Proceedings ICT 2002: 21st International Conference on Thermoelectrics (pp. 181-184). [1190295] (International Conference on Thermoelectrics, ICT, Proceedings; Vol. 2002-January). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICT.2002.1190295