CAJ | 학술논문

采用油柱成型法制备了一种核壳结构磁性氧化铝球,结果表明以球状Fe3 O4为磁核合成的Fe3 O4/SiO2/γ-Al2 O3磁性球在500° C 煅烧下,表面光滑,粒径分布为100~300μm,比表面积为200m2/g,平均孔径为16．8nm,孔容为0．77cm3/g,比饱和磁化强度较高(15．1emu/g),矫顽力和剩磁较低。
채용유주성형법제비료일충핵각결구자성양화려구,결과표명이구상Fe3 O4위자핵합성적Fe3 O4/SiO2/γ-Al2 O3자성구재500° C 단소하,표면광활,립경분포위100~300μm,비표면적위200m2/g,평균공경위16．8nm,공용위0．77cm3/g,비포화자화강도교고(15．1emu/g),교완력화잉자교저。
Magnetic alumina composite spheres with Fe3 O4 core/Al2 O3 shell structure were prepared by the oil column method. The results show that the specific surface area and pore volume of the spheres calcined at 500°C with smooth surface were 200 m2/g and 0. 77cm3/g,respectively. The distribution of particle size is about 100~200μm,which has high magnetization saturation(15. 1emu/g) ,and low coercivity remanence.