| Numéro |
J. Phys. IV France
Volume 07, Numéro C1, Mars 1997
7th INTERNATIONAL CONFERENCE ON FERRITES
|
|
|---|---|---|
| Page(s) | C1-83 - C1-84 | |
| DOI | https://doi.org/10.1051/jp4:1997122 | |
7th INTERNATIONAL CONFERENCE ON FERRITES
J. Phys. IV France 07 (1997) C1-83-C1-84
DOI: 10.1051/jp4:1997122
1 Research School of Physical Sciences and Engineering, Australian National University, Canberra, A.C.T. 0200, Australia
2 Advanced Mineral Products Research Centre, University of Melborne, Parkville, VIC 3052, and Hahn-Meitner-Institut, Abt. Kleinteilchenforschung, 14109 Berlin, Germany
© EDP Sciences 1997
J. Phys. IV France 07 (1997) C1-83-C1-84
DOI: 10.1051/jp4:1997122
XRD and HREM Studies of Structural Phases in Non-Stoichiometric Complex Iron Oxides
W.A. Kaczmarek1 and M. Giersig21 Research School of Physical Sciences and Engineering, Australian National University, Canberra, A.C.T. 0200, Australia
2 Advanced Mineral Products Research Centre, University of Melborne, Parkville, VIC 3052, and Hahn-Meitner-Institut, Abt. Kleinteilchenforschung, 14109 Berlin, Germany
Abstract
The influence of prolonged ball milling on structural changes of hexagonal and spinel type complex iron oxides
has been studied by x-ray diffraction and high resolution electron microscopy. The XRD and HREM results for ball milled
SrFe12O19 ferrite show fast decomposition and formation of Fe2O3 and SrO simple oxides. Microstructural developments for
a powder mixture of Co(OH)2 and Fe2O3 show the formation of cubic type structure (spinel). By comparison with the XRD
results, HREM analysis confirmed local phase separation, with magnetic Fe3O4 and CoFe2O4 nanosize (10-30 nm) particles
being formed.
© EDP Sciences 1997