자기 조립 전구체를 이용한 초음파 분무 열분해 공정으로 제조한 BaFe12O19의 자기적 특성에 대한 연구
A study on Magnetic Properties of BaFe12O19 Fabricated by Ultrasonic Spray-pyrolysis Process Using Self-Assembly Method
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초록
Hexagonal barium ferrite (BaFe12O19) nano-particles have been successfully fabricated by spraypylorysis process. BaFe12O19 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. BaFe12O19 powders were synthesized with addition of Fe ions to Ba-DEA complex and then fabricated BaFe12O19 powders by spray-pyrolysis process at the temperature range of 800~1000oC. The molar ratio of Ba/DEA and heat-treatment temperatures significantly affected the magnetic properties and morphology of BaFe12O19powders. BaFe12O19 powders synthesized with Ba/DEA molar ratio of 1 and heat-treated at 900oC showed the coercive forces (iHc) of 4.2 kOe with average crystal size of about 100 nm.
Abstract
Hexagonal barium ferrite (BaFe12O19) nano-particles have been successfully fabricated by spraypylorysis process. BaFe12O19 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. BaFe12O19 powders were synthesized with addition of Fe ions to Ba-DEA complex and then fabricated BaFe12O19 powders by spray-pyrolysis process at the temperature range of 800~1000oC. The molar ratio of Ba/DEA and heat-treatment temperatures significantly affected the magnetic properties and morphology of BaFe12O19powders. BaFe12O19 powders synthesized with Ba/DEA molar ratio of 1 and heat-treated at 900oC showed the coercive forces (iHc) of 4.2 kOe with average crystal size of about 100 nm.
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