Change search
ReferencesLink to record
Permanent link

Direct link
The effect of Mg doping on the thermoelectric performance of Zn4Sb3
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
Show others and affiliations
2009 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 105, no 1, 13517- p.Article in journal (Refereed) Published
Abstract [en]

Cation doping studies of high performance thermoelectric (ZnSb3)-Sb-4 have so far focused on elements with larger electronegativity than Zn. Mg has a lower electronegativity than Zn, and, in the present paper, the effect of Mg doping of Zn4Sb3 on phase transition temperatures and thermal and thermoelectric properties have been studied on five samples with a doping degree ranging from 0.1 to 2 at. % Mg. The results are compared with data obtained for a pure, undoped sample. Laboratory x-ray powder diffraction shows that all samples are single phase materials as further evidenced with higher confidence by Rietveld refinement of high resolution synchrotron powder diffraction of as synthesized 1 and 2 at. % Mg doped samples. Multitemperature synchrotron powder diffraction and differential scanning calorimetry reveal a significant effect of Mg-doping on the low temperature phase transitions in one sample (0.5 at. % Mg), whereas the other samples showed only small or no effect. Physical properties have been evaluated from 2-400 K for all samples. Some physical property parameters are affected by doping but no immediate improvement of ZT was achieved. The reason for this is discussed in relation to differences in sample compaction. 

Place, publisher, year, edition, pages
2009. Vol. 105, no 1, 13517- p.
Keyword [en]
phonon-glass, material beta-zn4sb3, phase-transition, low-temperatures, zinc
National Category
Physical Sciences
URN: urn:nbn:se:su:diva-60391DOI: 10.1063/1.3037203ISI: 000262534100050OAI: diva2:434743
authorCount :5Available from: 2011-08-16 Created: 2011-08-16 Last updated: 2011-08-16Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Nygren, Mats
By organisation
Department of Materials and Environmental Chemistry (MMK)
In the same journal
Journal of Applied Physics
Physical Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 32 hits
ReferencesLink to record
Permanent link

Direct link