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http://dx.doi.org/10.4150/KPMI.2010.17.4.263

A study on Magnetic Properties of BaFe12O19 Fabricated by Ultrasonic Spray-pyrolysis Process Using Self-Assembly Method  

Choi, Moon-Hee (School of Materials Science and Engineering, Pusan National University)
Yu, Ji-Hun (Powder Technology Group, Korea Institute of Materials Science)
Kim, Dong-Hwan (Powder Technology Group, Korea Institute of Materials Science)
Chung, Kook-Chae (Powder Technology Group, Korea Institute of Materials Science)
Kim, Yang-Do (School of Materials Science and Engineering, Pusan National University)
Publication Information
Journal of Powder Materials / v.17, no.4, 2010 , pp. 263-269 More about this Journal
Abstract
Hexagonal barium ferrite ($BaFe_{12}O_{19}$) nano-particles have been successfully fabricated by spraypylorysis process. $BaFe_{12}O_{19}$ precursor solutions were synthesized by self-assembly method. Diethyleneamine (DEA) surfactant was used to fabricate the micelle structure of Ba-DEA complex under various DEA concentrations. $BaFe_{12}O_{19}$ powders were synthesized with addition of Fe ions to Ba-DEA complex and then fabricated $BaFe_{12}O_{19}$ powders by spray-pyrolysis process at the temperature range of $800{\sim}1000^{\circ}C$. The molar ratio of Ba/DEA and heat-treatment temperatures significantly affected the magnetic properties and morphology of $BaFe_{12}O_{19}$ powders. $BaFe_{12}O_{19}$ powders synthesized with Ba/DEA molar ratio of 1 and heat-treated at $900^{\circ}C$ showed the coercive forces (iHc) of 4.2 kOe with average crystal size of about 100 nm.
Keywords
$BaFe_{12}O_{19}$; Spray-pyrolysis; Self-assembly method; DEA;
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Times Cited By KSCI : 1  (Citation Analysis)
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