Highly sinterable cobalt ferrite particles prepared by a modified solution combustion synthesis

Highly sinterable CoFe2O4 particles were prepared by a modified solution combustion synthesis, starting from a stoichiometric mixture of cobalt acetate (instead of cobalt nitrate), iron nitrate and 5-aminotetrazole. The resulted cobalt ferrite powder had large surface area (44m2/g), small crystallit...

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Bibliographic Details
Published in:Materials letters 2014-11, Vol.135, p.24-26
Main Author: Iano, Robert
Format: Article
Language:English
Subjects:
Cobalt ferrite
Cobalt ferrites
Combustion synthesis
Crystallites
Iron
Magnetic materials
Nanocrystalline materials
Nitrates
Saturation (magnetic)
Sintering
Surface area
Theoretical density
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Summary:Highly sinterable CoFe2O4 particles were prepared by a modified solution combustion synthesis, starting from a stoichiometric mixture of cobalt acetate (instead of cobalt nitrate), iron nitrate and 5-aminotetrazole. The resulted cobalt ferrite powder had large surface area (44m2/g), small crystallite size (11nm) and a saturation magnetization of 38.9Am2/kg. CoFe2O4 pellets sintered at 1100°C for 2h developed a fine compact microstructure, reaching 99% of the theoretical density. After sintering, the saturation magnetization increased to 71.3Am2/kg whilst the coercivity decreased to 21.8kA/m. •Highly sinterable CoFe2O4 particles were prepared by a modified combustion technique.•The CoFe2O4 powder had a BET surface area of 44m2/g and crystallites of 11nm.•CoFe2O4 had a saturation magnetization of 38.9Am2/kg and a coercivity of 74.2kA/m.•After sintering at 1100°C/2h, CoFe2O4 pellets reached 99% of the theoretical density.•The sintering temperature of CoFe2O4 was decreased by approximately 300°C.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2014.07.126