摘要
采用油柱成型法合成了以针状α-Fe2O3为磁核,氧化硅为中间层,氧化铝为壳层的磁性微球;并通过控制不同的还原温度,获得了两种不同比饱和磁化强度的磁性微球,其中Fe3O4/SiO2/γ-Al2O3为15.1 emu/g,Fe/SiO2/γ-Al2O3为26 emu/g,且磁性球的表面光滑,粒径分布为80～300 μm.
Magnetic alumina composite spheres with α-Fe2O3 core/SiO2 medium Al2O3 shell structure were prepared by the oil column method. The results showed that the specific saturation intensition of magnetization of Fe3 O4/SiO2/γ-Al2O3 and Fe/SiO2 γ-Al2O3 magnetic composite spheres with smooth surface prepared after reduction at different temperatures were 15.1 emu/g and 26 emu/g, respectively. The distribution of particle size was in the range of 80-300μm.
出处
《化学世界》
CAS
CSCD
2015年第7期396-400,404,共6页
Chemical World
基金
国家自然科学基金(20806093)
关键词
磁性氧化铝球
核壳结构
油柱成型法
magnetic alumina spheres
core-shell structure
oil column method
