Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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A study on Magnetic Properties of BaFe12O19 Fabricated by Ultrasonic Spray-pyrolysis Process Using Self-Assembly Method

자기 조립 전구체를 이용한 초음파 분무 열분해 공정으로 제조한 BaFe12O19의 자기적 특성에 대한 연구

  • 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)
  • 최문희 (부산대학교 재료공학과 에너지재료 실험실) ;
  • 유지훈 (한국기계연구원 부설 재료연구소 분말재료연구부) ;
  • 김동환 (한국기계연구원 부설 재료연구소 분말재료연구부) ;
  • 정국채 (한국기계연구원 부설 재료연구소 분말재료연구부) ;
  • 김양도 (부산대학교 재료공학과 에너지재료 실험실)
  • Received : 2010.05.17
  • Accepted : 2010.06.14
  • Published : 2010.08.28
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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.

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References

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