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J. Korean Ceram. Soc. > Volume 31(3); 1994 > Article
Journal of the Korean Ceramic Society 1994;31(3): 235.
$Mg_{1.9-2x}Mn_{0.05}Fe_{4x}O_{4+${gamma}$}+2_{wt%} Al_2O_3$ 조성내 Fe량 변화에 따른 페라이트의 미세구조 및 자기적 특성 연구
김성재, 정명득, 강대석
국방과학연구소 기술연구본부 3부 2팀
The Study on Microstructure and Magnetic Properties of Ferrite with Various Fe Contents in $Mg_{1.9-2x}Mn_{0.05}Fe_{4x}O_{4+${gamma}$}+2_{wt%} Al_2O_3$
ABSTRACT
The electric and magnetic properties of Mg1.9-2xMn0.05Fe4xO4+${gamma}$+2wt% Al2O3, and its microstructure have been investigated as a function of ferrite composition (x=0.45, 0.5, 0.55). The microstructure turned out to be independent on the ferrite composition. The resistivity was decreased with increasing Fe contents, whereas the Curie temperature decreased. Saturation magnetization was varied from 1741 to 2022 G with composition, and squareness ratio (SR), coercive force (BHc) were decreased and increased with increasing Fe contents respectively, so the sample which SR and BHc were 0.97 Oe and 1.49 Oe can be attainable at x=0.45.
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