Dysprosium Modification of Cobalt Ferrite Ionic Magnetic Fluids
Dysprosium composite cobalt ferrite ionic magnetic fluids were prepared by precipitation in the presence of Tri-sodium citrate. Influence of dysprosium modification on magnetic property is studied. The result shows that magnetic response toward exterior magnetic field can be improved by adding Dy3+. Studies also show that the increase of reaction temperature may improve the modification effect of dysprosium. By adding dysprosium ions, the average diameter of the magnetic nanoparticles will be decreased evidently. It is clear that the particles appear as balls, Cobalt ferrite with sizes of 12-15 nm, rare earth composite cobalt ferrite with sizes of 6-8 nm.
作 者： JIANG Rong-li LIU Yong-chao GENG Quan-rong ZHAO Wen-tao 作者单位： School of Chemical Engineering and Technology,China University of Mining &Technology,Xuzhou,Jiangsu 221008,China 刊 名： 中国矿业大学学报（英文版） ISTIC EI 英文刊名： JOURNAL OF CHINA UNIVERSITY OF MINING & TECHNOLOGY 年，卷(期)： 2005 15(4) 分类号： O648.15 关键词： cobalt ferrite magnetic fluids dysprosium modification mechanism magnetic property