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- 자기 조립 전구체를 이용한 초음파 분무 열분해 공정으로 제조한 BaFe12O19의 자기적 특성에 대한 연구
- 최문희, 유지훈, 김동환, 정국채, 김양도
- A study on Magnetic Properties of BaFe12O19 Fabricated by Ultrasonic Spray-pyrolysis Process Using Self-Assembly Method
- Moon-Hee Choi, Ji-Hun Yu, Dong-Hwan Kim, Kook-Chae Chung, Yang-Do Kim
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Journal of Korean Powder Metallurgy Institute 2010;17(4):263-269
DOI: https://doi.org/10.4150/KPMI.2010.17.4.263
2한국기계연구원 부설 재료연구소 분말재료연구부
3한국기계연구원 부설 재료연구소 분말재료연구부
4한국기계연구원 부설 재료연구소 분말재료연구부
5부산대학교 재료공학과 에너지재료 실험실
1School of Materials Science and Engineering, Pusan National University
2Powder Technology Group, Korea Institute of Materials Science
3Powder Technology Group, Korea Institute of Materials Science
4Powder Technology Group, Korea Institute of Materials Science
5School of Materials Science and Engineering, Pusan National University
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Abstract
Hexagonal barium ferrite (BaFe_12O_19) nano-particles have been successfully fabricated by spraypylorysis process. BaFe_12O_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_12O_19 powders were synthesized with addition of Fe ions to Ba-DEA complex and then fabricated BaFe_12O_19 powders by spray-pyrolysis process at the temperature range of 800sim1000°C. The molar ratio of Ba/DEA and heat-treatment temperatures significantly affected the magnetic properties and morphology of BaFe_12O_19 powders. BaFe_12O_19 powders synthesized with Ba/DEA molar ratio of 1 and heat-treated at 900°C showed the coercive forces (iHc) of 4.2 kOe with average crystal size of about 100 nm.
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