Title :
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.
Abstract :
The thermal stability of high performance thermoelectric Zn4 Sb3 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;
Conference_Titel :
Thermoelectrics, 2006. ICT '06. 25th International Conference on
Conference_Location :
Vienna
Print_ISBN :
1-4244-0811-3
Electronic_ISBN :
1094-2734
DOI :
10.1109/ICT.2006.331347
