Dependence of Microstructure of Sintered <TEX>$Y_3$</TEX>Fe<TEX>$_5$</TEX>O<TEX>$_{12}$</TEX> in Addition of CuO

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J. Korean Ceram. Soc. > Volume 35(10); 1998 > Article

Journal of the Korean Ceramic Society 1998;35(10): 1014.

CuO 첨가에 따른 $Y_3$Fe$_5$O$_{12}$ 소결체의 미세구조 변화

이재동, 김광석, 김성재¹, 김태옥

부산대학교 공과대학 무기재료공학과
¹국방과학연구소

Dependence of Microstructure of Sintered $Y_3$Fe$_5$O$_{12}$ in Addition of CuO

ABSTRACT

As results of the study on the sinterbility of YIG at the low temperature using CuO as additive CuO com-pound which contain {{{{ { {Fe }_{2 }O }_{3 } }} was shown liquid in sintering process. YIG crystal dissolved into CuO compound liquid phase and then Y element which is considered no solubility in solid CuO compound moved to the grain during cooling. The abnormal grain growth up to 150${mu}{textrm}{m}$ at CuO 8.6mole% was shown due to shape accomdation reaction and local liquid distribution. The apparent density of YIG shows minimum at CuO 8.6 mole% due to abnormal grain growth and the saturation magnetization decrease dramatically at 32.5mole% due to orthoferrite formation.

Key words: Granet, YIG, Magnetism, Orthoferrite