Article (Scientific journals)
Influence of synthesis methods with low annealing temperature on the structural and magnetic properties of CoFe2O4 nanopowders for permanent magnet application
Abraime, B.; El Maalam, Khadija; Fkhar, L. et al.
2020In Journal of Magnetism and Magnetic Materials, 500, p. 166416
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Keywords :
Cobalt ferrite; Maximum energy product; Permanent magnet; Synthesis methods
Abstract :
[en] Cobalt ferrite nanopowders were prepared with low annealing temperatures (400 °C and 600 °C) using four different synthesis methods: co-precipitation, sol-gel, sol-gel autocombustion and microemulsion. The pure phase is obtained in all the samples and confirmed using the XRD diffraction. The crystallite size is calculated based on the XRD patterns and ranged between ~9 nm and ~26 nm. The SEM micrographs show an agglomeration with an increase of grain size between 400 °C and 600 °C samples for all the used methods. The magnetic properties are given. The best obtained values are MS = 80,319 emu/g, HC = 2057,97 Oe and (BH)max = 0.3313 MGOe for co-precipitation, sol-gel and sol-gel autocombustion, respectively. An improvement of 89% in (BH)max value is observed in the case of sol-gel auto-combustion when we go from 400 °C to 600 °C.
Research center :
GreenMat
Disciplines :
Physics
Author, co-author :
Abraime, B.
El Maalam, Khadija
Fkhar, L.
Mahmoud, Abdelfattah  ;  Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT
Boschini, Frédéric ;  Université de Liège - ULiège > Plateforme APTIS
Tamerd, M. Ait
Benyoussef, Abdelillah Ilah
Hamedoun, Mohammed
Hlil, Elkebir
Ait Ali, Mustapha
El Kenz, Abdallah
Mounkachi, Omar
Language :
English
Title :
Influence of synthesis methods with low annealing temperature on the structural and magnetic properties of CoFe2O4 nanopowders for permanent magnet application
Publication date :
15 April 2020
Journal title :
Journal of Magnetism and Magnetic Materials
ISSN :
0304-8853
eISSN :
1873-4766
Publisher :
Elsevier, Amsterdam, Netherlands
Volume :
500
Pages :
166416
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
Walloon region [BE]
Available on ORBi :
since 15 January 2020

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