Magnetic Properties and Microstructure of La-substituted Ba-ferrite Composites
A Self-Propagating Combustion Synthesis (SPCS) method, citrate SPCS method, was used to synthesize crystalline powders of La-substituted barium hexaferrit, according to the formula Ba<,1-x>La<,x>Fe <,11.5>Cr<,0.5>O<,19> (x=0~0.25). The structures, morphologies and ferromagnetic properties of La<3+> substituted composites were characterized by powder X-Ray Diffractometer (XRD), Transmission Electron Microscope (TEM) and Vibrating Sample Magnetometer (VSM). XRD results showed that it was possible to obtain single-phase barium ferrite powders at 1100℃ and La content x<0.2. From the SEM, it was observed that the particles calcined at 1100℃ had a plate- like hexagonal shape. The results of magnetic mensuration revealed that the magnetic properties of La-substituted samples were obviously affected by La content. With the increasing of the La content, the saturation magnetization of Ba<,1-x>La<,x>Fe<,11.5>Cr <,0.5>O<,19> (x=0~0.25) increased from 50.1 to 56.2 emu·g<-1>, and coercivity increased from 1411.1 Oe to 1544.6 Oe.
self-propagating combustion synthesis composites La-substituted Ba-ferrite magnetic properties rare earths
Wang Yuping(王育萍) Li Liangchao(李良超) Liu Hui(刘徽) Qiu Haizhen(仇海珍)
Zhejiang Key Laboratory for Reactive Chemistry on Solid Surface, Department of Chemistry, Zhejiang Normal University, Jinhua 321004, China
国际会议
第五届国际稀土开发与应用研讨会(The Fifth International Conference on Rare Earth Decelopment and Applicatin)
包头
英文
221-224
2007-08-07（万方平台首次上网日期，不代表论文的发表时间）