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

Langhof N, Seifert D, Göbbels M, Toepfer J (2009)

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Publication Language: English

Publication Type: Journal article

Publication year: 2009

Journal

Publisher: Elsevier

Book Volume: 182

Pages Range: 2409-2416

Journal Issue: 9

DOI: 10.1016/j.jssc.2009.05.039

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; Sr₄Fe₆O_13±δ appears as a second phase in compositions with <85.71±0.2 mol% Fe₂O₃. Sr₄Fe₆O_13±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.

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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://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.

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