초미립 MnxZn1-xFe2O4(x = 0.69~0.74)분말의 제조 및 자기적 성질

Abstract

MnxZn1-xFe2O4(x = 0.69 ~ 0.74) powders were synthesized by the thermal decomposition of organic acid salts. The obtained powders were uniform in composition and ultra-fine particle with about 400 nm. The amount of spinel phase of these powders was about 50% in X-ray diffraction patterns. The calcination of powder was carried out at 900℃ for 2 hours in air. After the powders were calcined, the mean size of powder was about 500 nm and the amount of spinel phase was increased over about 65%. The maximum amount of spinel phase was about 75% in the specimen of X = 0.72. The magnetic properties of calcined Mn0.72Zn0.28Fe2O4 powders were the best among the different compositions.