Journal
CERAMICS INTERNATIONAL
Volume 35, Issue 5, Pages 1933-1937Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2008.10.016
Keywords
Powders: gas-phase reaction; Powders: chemical preparation; Magnetic properties
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Highly crystalline nanosized barium ferrite (BaFe12O19) powders were prepared by spray pyrolysis from a spray solution containing a high concentration of the metal components. The precursor powders obtained from the spray solution containing citric acid were amorphous with a porous and hollow structure. Purely crystalline and fine BaFe12O19 powders were obtained after post-treatment between 700 and 1000 degrees C and subsequent mechanical grinding in an agate mortar. The mean sizes of the powders post-treated at 700 and 1000 degrees C were 125 and 550 nm, respectively. The specific magnetization of the powders prepared from the spray solution containing citric acid was 57 emu/g. (C) 2008 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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