Preparation of SrFe12O19 · 6SrB2O4 magnetic composites by spray pyrolysis

Spray pyrolysis has been used to produce X-ray amorphous precursors with the nominal composition SrFe 12 O 19 · 6SrB 2 O 4 in the form of spherical particles 0.3 to 2 μm in diameter. Heat treatment of the precursors at temperatures from 650 to 900°C has produced platelike strontium hexaferrite parti...

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Bibliographic Details
Published in:Inorganic materials 2010-10, Vol.46 (10), p.1137-1142
Main Authors: Usovich, O. V., Trusov, L. A., Kazin, P. E., Tret’yakov, Yu. D.
Format: Article
Language:English
Subjects:
Annealing
Chemistry
Chemistry and Materials Science
Coercive force
Heat treatment
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Materials Science
Particulate composites
Precursors
Spray pyrolysis
Strontium
X-rays
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Summary:Spray pyrolysis has been used to produce X-ray amorphous precursors with the nominal composition SrFe 12 O 19 · 6SrB 2 O 4 in the form of spherical particles 0.3 to 2 μm in diameter. Heat treatment of the precursors at temperatures from 650 to 900°C has produced platelike strontium hexaferrite particles embedded in a SrB 2 O 4 matrix. With increasing annealing temperature, the average dimensions of the hexaferrite particles increase from 80 × 20 to 450 × 100 nm and the coercivity of the material rises from 240 to 440 kA/m.
ISSN:0020-1685
1608-3172
DOI:10.1134/S0020168510100201