Loading…
Reducibility and magnetic properties of nanosized ZnO substituted Fe2O3/TiO2 system
Pure Fe 2 O 3 and TiO 2 powder were mixed in molar ratio and fired in a muffle furnace at 1200°C for 4 h. The Fe 2 TiO 5 compound formed was doped by replacing TiO 2 with calculated amounts of ZnO (ZnO fractions x=0·2, 0·4, 0·6, 0·8 and 1). The synthesised samples were characterised with X-ray diffr...
Saved in:
Published in: | Materials technology (New York, N.Y.) N.Y.), 2008-03, Vol.23 (1), p.39-44 |
---|---|
Main Authors: | , , |
Format: | Article |
Language: | English |
Subjects: | |
Online Access: | Get full text |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Summary: | Pure Fe
2
O
3
and TiO
2
powder were mixed in molar ratio and fired in a muffle furnace at 1200°C for 4 h. The Fe
2
TiO
5
compound formed was doped by replacing TiO
2
with calculated amounts of ZnO (ZnO fractions x=0·2, 0·4, 0·6, 0·8 and 1). The synthesised samples were characterised with X-ray diffraction (XRD) and their magnetic properties were measured using a vibrating sample magnetometer. Fe
2
TiO
5
, 2FeZnTiO
4
, Fe
2
ZnTi
3
O
10
, ZnTiO
3
and ZnFe
2
O
4
phases were detected with very low magnetic properties corresponding to dilute magnetic semiconductors. Reduction tests in hydrogen at 500°C showed the reducibility of the undoped compound to be very low and to increase gradually with increasing Zn content in the ferrite phase. The reduction process caused a pronounced change in the magnetic properties. |
---|---|
ISSN: | 1066-7857 1753-5557 |
DOI: | 10.1179/175355508X266854 |