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Journal of the Korean Ceramic Society 1986;23(2): 31. |
실리카 피착이 철분말의 입자형태 및 자기특성에 미치는 영향(제2보) |
오재희, 김종식, 류병환 |
인하대학교 공과대학 무기재료공학과 |
Effect of Silica Coating on Particle Shape and Magnetic Properties of Iron Powder (II) |
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ABSTRACT |
The effect of dehydration temperature on the reduction process of silica-coated hematite was invest-igated The particle shape and magnetic properties of the products reduced from hematite at various conditions and the oxidation resistance of silica-coated iron powder were examined. It was revealed that single phase iron powder obtained over 45$0^{circ}C$ had good magnetic properties. The iron powder manufactured between 45$0^{circ}C$ and 50$0^{circ}C$ displayed the maximum coercive force as a result of maintaining its acicular shaped. However the coercive force of iron powder reduced over 50$0^{circ}C$ was decreased. The oxidation resistance of silica-coated iron powder in air was very good up to 11$0^{circ}C$ and for 12 days. |
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