고상반응법으로 제조된 Ba2Co2Fe12O22분말의 자기적 성질과 미세구조에 미치는 금속이온몰비와 열처리 온도의 영향

Abstract

Y-type 바리움 페라이트 <TEX>$Ba_2Co_2Fe_{12}O_{22}$</TEX>를 고상반응법으로 제조하고 금속이온몰비(<TEX>$Fe^{3+}:\;Ba^{2+}:\;Co^{2+}$</TEX>)와 열처리 온도가 자기적 성 질과 미세구조에 미치는 영향에 대하여 조사하였다. 상분석과 미세구조는 각각 XRD(X-ray diffractometer)와 FESEM(field effect scanning electron microscope)을 이용하여 조사하였으며 분말의 자기적 성질은 VSM(vibrating sample magnetometer)을 이용하여 조사하였다. 금속이온몰비(<TEX>$Fe^{3+}:\;Ba^{2+}:\;Co^{2+}$</TEX>)가 6 : 1 : 1인 조성의 분말을 <TEX>$1050\;{^{\circ}C}$</TEX>에서 열처리하였을 때 단일 상이 합성되었으며 8 : 1 : 1인 조성의 분말을 <TEX>$1200\;{^{\circ}C}$</TEX>에서 열처리하였을 때 가장 높은 포화자화값(39.1 emu/g)을 나타내었다. Y-type barium ferrite <TEX>$Ba_2Co_2Fe_{12}O_{22}$</TEX> was synthesized by a solid state reaction method. Effects of metal ion mole ratio and calcination temperatures on magnetic properties and microstructures of the synthesized powders were investigated. Phase analysis and microstructure observation were performed with a XRD (X-ray diffractometer) and a FESEM (field effect scanning electron microscope), respectively. Magnetic properties of the powders were measured with a VSM (vibrating sample magnetometer). Single phase Y-type was synthesized when metal ion mole fraction <TEX>$Fe^{3+}:\;Ba^{2+}:\;Co^{2+}$</TEX> was 6 : 1 : 1 and calcination temperature was <TEX>$1050\;{^{\circ}C}$</TEX>. High saturation magnetization value of 39.1 emu/g was obtained when metal ion mole fraction <TEX>$Fe^{3+}:\;Ba^{2+}:\;Co^{2+}$</TEX> was 8 : 1 : 1 and calcination temperature was <TEX>$1200\;{^{\circ}C}$</TEX>.