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Improved properties of BaFe12O19 prepared by ammonium nitrate melt technique and washed in HCl
Date
2006-09-28
Author
Topal, Ugur
Ozkan, Husnu
Topal, Kevser Gocmen
Metadata
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This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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We have synthesized BaFe12O19 samples by ammonium nitrate melt technique (ANMT) at temperatures from 850 to 1200 degrees C. Calcinations at 850-1000 degrees C yield single domain grains having reasonably high coercive fields up to 4500 Oe. Higher temperature calcinations decrease the coercive fields due to multi-domain grain growth. Washing the samples in HCl is effective to reduce the impurities, especially the antiferromagnetic BaFe2O4. HCl-washing increases magnetization by about 50%; the saturation magnetization increases from 36-45 to 58-62 emu/g and the residual magnetization from 21-26 to 32-34 emu/g.
Subject Keywords
Barium ferrites
,
Magnetic measurements
,
Magnetization
,
Chemical synthesis
,
Permanent magnets
URI
https://hdl.handle.net/11511/66320
Journal
JOURNAL OF ALLOYS AND COMPOUNDS
DOI
https://doi.org/10.1016/j.jallcom.2005.11.043
Collections
Department of Physics, Article