자기 조립법을 이용한 BaFe12O19의 제조 및 자성 특성에 대한 연구
A Study on Magnetic Properties of BaFe12O19 Fabricated by Self-assembly Method
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Hexagonal barium ferrite (BaFe12O19) nano-particles have been successfully synthesised using selfassembly 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 Fe ions to Ba-DEA complex and then heat treated at temperature range of 800~1000℃. The molar ratio of Ba/DEA and heat-treatment temperature significantly affected the magnetic properties and morphology of BaFe12O19 powders. BaFe12O19 powders synthesized with Ba/DEA molar ratio of 1 and heat-treated at 1000℃ for 1 hour showed the coercive forces (iHc) of 4.84 kOe with average crystal size of about 200 ㎚.
Abstract
Hexagonal barium ferrite (BaFe12O19) nano-particles have been successfully synthesised using selfassembly 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 Fe ions to Ba-DEA complex and then heat treated at temperature range of 800~1000℃. The molar ratio of Ba/DEA and heat-treatment temperature significantly affected the magnetic properties and morphology of BaFe12O19 powders. BaFe12O19 powders synthesized with Ba/DEA molar ratio of 1 and heat-treated at 1000℃ for 1 hour showed the coercive forces (iHc) of 4.84 kOe with average crystal size of about 200 ㎚.
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