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J. Korean Ceram. Soc. > Volume 29(10); 1992 > Article
Journal of the Korean Ceramic Society 1992;29(10): 765.
유리결정화에 의한 Ferroxplana Ba2Zn2Fe12O22 미세 단결정의 제조
김성재, 김동호, 김태옥
부산대학교 공과대학 무기재료공학과
Preparation of Fine Single-Crystalline Particles of Ferroxplana, Ba2Zn2Fe12O22 from Crystallization of Glass
ABSTRACT
As the fundamental research of preparation of fine single crystalline ferroxplana by means of glass-crystallization methods using steel twin-roller the properties of ferroxplana extracted from cyrstallized glass were studied. Most of all the specimens quenched by twin-roller at about 1350$^{circ}C$ were glass phase, the crystallization of these glass had multi-steps and ferroxplana phase was only stable untill 900$^{circ}C$, began to be decomposed from about 950$^{circ}C$ in glass. The morphology of particle could be controlled by the composition and crystallization condition, and Zn2+ was replaced by reduced Fe2+ which is 2∼3% contents of total Fe. Ferroxplana extracted had such magnetic properties as Ms=34 emu/g, mHc=10 Oe and Curie Temperature, Tc=425K.
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