Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 260, Issue 3, Pages 455-461Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0304-8853(02)01389-6
Keywords
barium ferrite; precursor method; hard magnets; magnetic properties; ceramics
Ask authors/readers for more resources
The single domain size of BaFe12O19 powder with crystallite sizes less than 200 nm was produced using a citric acid precursor method. Fe3+ and Ba2+, in a molar ratio of 12, were chelated by COOH- in an aqueous solution. After ethylene glycol additions, esterification, dehydration, and calcination led to the formation of ester-derived BaFe12O19 powder. High pH and/or high citric acid contents in the starting solution are required to complete chelate metallic ions in the solution and to form pure barium ferrite powder at 1073 K. Pure single magnetic domain BaFe12O19 particles of M(30 kOe) approximate to 54 emu/g, M-r approximate to 28 emu/g, and H-c approximate to 3.7 kOe were produced using [citric acid]/[metallic ions] = 1.5 and pH greater than or equal to 7. (C) 2002 Elsevier Science B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available