Synthesis and characterization of ultrafine cobalt ferrites

Author

Pannaparayil, T. ; Komarneni, S.

Author_Institution

Penn State Univ., University Park, PA, USA

Volume

25

Issue

5

fYear

1989

fDate

9/1/1989 12:00:00 AM

Firstpage

4233

Lastpage

4235

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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.42579

Filename

42579