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J. Korean Ceram. Soc. > Volume 32(1); 1995 > Article
Journal of the Korean Ceramic Society 1995;32(1): 1.
하소온도에 따른 Mg-페라이트 소결체의 미세구조 및 전기.자기적 특성 연구
김성재, 정명득, 백종규
국방과학연구소 기술연구본부
Microstructure, Electric, and Magnetic Properties of Mg-Ferrite with Various Calcination Temperature
ABSTRACT
Effects of calcination temperature on microstructure and electric-magnetic properties of Mg-ferrite were investigated. As the calcination temperature increase, the green density and the sintered density increase due to the enhancement of densification of calcined powder. The grain size in the sintered ferrite increases with increasing the calcination temperatures from 800 to 100$0^{circ}C$, but decreases from 1000 to 120$0^{circ}C$. The resistivity decreases with increasing the calcination temperatures from 800 to 110$0^{circ}C$, but increases from 1100 to 120$0^{circ}C$ due to the microstructure which consists of small, uniform grian size and pores at grain boundaries. Magnetization increases slightly due to the increasement of the sintered density while Curie temperature is almost constant regardless of calcination temperatures.
Key words: Calcination, Microstructure, Mg-ferrite Electric, Magnetic
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