Title :
Synthesis and characterization of ultrafine cobalt ferrites
Author :
Pannaparayil, T. ; Komarneni, S.
Author_Institution :
Penn State Univ., University Park, PA, USA
fDate :
9/1/1989 12:00:00 AM
Abstract :
Ultrafine, nearly spherical particles of CoFe2O4 were prepared under mild hydrothermal conditions. These ferrite particles were found to be superparamagnetic with a narrow particle size distribution in the range 10.0-40.0 nm. The hydrothermal ferrite powders could be sintered to almost theoretical density with little or no intergranular porosity. The present study shows that magnetic measurements together with Mossbauer spectroscopy provide excellent tools for characterizing fine ferrite particles at macroscopic levels
Keywords :
Mossbauer effect; cobalt compounds; ferrimagnetic properties of substances; ferrites; magnetic variables measurement; powder technology; sintering; 10 to 40 nm; CoFe2O4; Mossbauer spectroscopy; characterization; characterizing fine ferrite particles; hydrothermal ferrite powders; macroscopic levels; magnetic measurements; mild hydrothermal conditions; narrow particle size distribution; sintering; spherical particles; superparamagnetic; synthesis; ultrafine particles; Cobalt; Density measurement; Electrons; Ethanol; Ferrites; Magnetic field measurement; Powders; Solids; Temperature; Weapons;
Journal_Title :
Magnetics, IEEE Transactions on
