Reinvestigation of the Fe-rich part of the pseudo-binary system SrO-Fe_2_O_3_

Journal article


Publication Details

Author(s): Langhof N, Seifert D, Göbbels M, Toepfer J
Journal: Journal of Solid State Chemistry
Publisher: Elsevier
Publication year: 2009
Volume: 182
Journal issue: 9
Pages range: 2409-2416
ISSN: 0022-4596
Language: English


Abstract


The phase relations in the Fe-rich part of the pseudo-binary system SrO–Fe2O3 (>33 mol% Fe2O3) were reinvestigated between 800 and 1500 °C in air. A combination of microscopy, electron probe micro-analysis, powder X-ray diffraction and thermal analysis was used to determine phase relations, crystal structure parameters and phase transition temperatures. M-type hexagonal ferrite SrFe12O19 (85.71 mol% Fe2O3) is stable up to 1410 °C. No indication of a significant phase width was found; Sr4Fe6O13±δ appears as a second phase in compositions with <85.71±0.2 mol% Fe2O3. Sr4Fe6O13±δ itself is stable between 800 and 1250 °C. Two other hexagonal ferrites were found to exist at high temperatures only: W-type SrFe2+2Fe3+16O27 is stable between 1350 and 1440 °C and X-type ferrite Sr2Fe2+2Fe3+28O46 between 1350 and 1420 °C, respectively, which is shown here for the first time. These findings in combination with previously published data were used to derive a corrected phase diagram of the Fe-rich part of the pseudo-binary system SrO–Fe2O3.



FAU Authors / FAU Editors

Göbbels, Matthias Prof. Dr.
Lehrstuhl für Mineralogie


External institutions
Ernst-Abbe-Fachhochschule Jena / University of Applied Sciences


How to cite

APA:
Langhof, N., Seifert, D., Göbbels, M., & Toepfer, J. (2009). Reinvestigation of the Fe-rich part of the pseudo-binary system SrO-Fe_2_O_3_. Journal of Solid State Chemistry, 182(9), 2409-2416. https://dx.doi.org/10.1016/j.jssc.2009.05.039

MLA:
Langhof, Nico, et al. "Reinvestigation of the Fe-rich part of the pseudo-binary system SrO-Fe_2_O_3_." Journal of Solid State Chemistry 182.9 (2009): 2409-2416.

BibTeX: 

Last updated on 2018-22-07 at 22:10