| 결합체 첨가 방법이 Sr-ferrite의 미세구조와 자기적 성질에 미치는 영향 |
| 이병교, 김정주, 조상희 |
| 경북대학교 공과대학 무기재료공학과 |
| Effect of Binder Addtion Method on Microstructure and Magnetic Prooperties of Sr-ferrite |
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| ABSTRACT |
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Effects of binder addition method during compacting on microstructural change and magnetic characteristics of Sr-ferrite system was investigated. Used binders were PVA and PEG, which were added separately or simultaneously. After compacts were heated at 50$0^{circ}C$ for 3hr in air for burning out all the binders, they were sintered at 125$0^{circ}C$ for 2h. Based on results, in the case of using the two binders simultaneously, comparing to single binder system, compacted density was somewhat higher but sintered density was rather lower, and abnormal grain growth was accelerated. According to these sintering characteristics, remanent magnetization and coercive force were also diminished. |
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