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Effect of particle size and its distribution on the fabrication and magnetic properties of barium ferrite powders prepared from coprecipitated precursors
Faculty
Science
Year:
2004
Type of Publication:
Article
Pages:
200-203
Authors:
Makled, MH, Matsui, T, Tsuda, H, Mabuchi, H, El-Mansy, MK, Morii, K
DOI:
10.2109/jcersj.112.200
Journal:
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN CERAMIC SOC JAPAN-NIPPON SERAMIKKUSU KYOKAI
Volume:
112
Research Area:
Materials Science
ISSN
ISI:000221596100003
Keywords :
Effect , particle size , , distribution , , fabrication , magnetic
Abstract:
Six kinds of powder samples with a different particle size and its distribution have been prepared from coprecipitated precursors by light grinding followed by sieving, and calcined in air to form the barium ferrite (BaFe(12)O(19)) phase. Correlation between the particle morphology and Fe/Ba molar ratio or magnetic properties has been examined. The results indicated that the powders consisting of coarse particles (100-200 mum) exhibit a single phase of BaFe(12)O(19), and a higher saturation magnetization and coercivity than the powders having fine particles or a wide size distribution. The optimized powders showed a high coercivity of 5.85 kOe and a saturation magnetization of 71 emu/g that are closed to the theoretical values.
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