High Temperature stability of thermoelectric Zn4Sb3

Author

Pedersen, B.L. ; Birkedal, H. ; Frederiksen, P.T. ; Iversen, B.B.

Author_Institution

Dept. of Chem., Aarhus Univ.

fYear

2006

fDate

6-10 Aug. 2006

Firstpage

520

Lastpage

523

Abstract

The thermal stability of high performance thermoelectric Zn₄Sb₃ has been investigated using multi-temperature, high resolution synchrotron powder diffraction. Rietveld refinement of the data show ~30 % impurity phases at 500 K, which is inconsistent with previous reports of stability up to 523 K. At 700 K almost 70% of the sample has degraded. The influence of anion doping of Zn₄Sb ₃ on the thermal stability is examined for a sample doped with 2.5% tellurium. The doping changes the decomposition pattern, but no immediate improvement in the thermal stability is observed

Keywords

X-ray diffraction; antimony compounds; powders; tellurium; thermal stability; thermoelectricity; zinc compounds; 500 K; 700 K; Rietveld refinement; Zn₄Sb₃; Zn₄Sb₃:Te; anion doping; decomposition pattern; impurity phases; synchrotron powder diffraction; tellurium; temperature stability; thermal stability; thermoelectric; Diffraction; Doping; Impurities; Powders; Synchrotrons; Temperature; Thermal degradation; Thermal stability; Thermoelectricity; Zinc;

fLanguage

English

Publisher

ieee

Conference_Titel

Thermoelectrics, 2006. ICT '06. 25th International Conference on

Conference_Location

Vienna

ISSN

1094-2734

Print_ISBN

1-4244-0811-3

Electronic_ISBN

1094-2734

Type

conf

DOI

10.1109/ICT.2006.331347

Filename

4133344