Structure and Magnetic Properties of BaLa0.5Fe11.5O19/SiO2
The paper aims at synthesizing La substituted BaM hexaferrites (BaLa0.5Fe11.5O19) in the presence of SiO2 nano-particles by sol-gel method.Effects of SiO2 nano-particles on the structure and particle size of hexaferrites are investigated by XRD and SEM.Magnetic properties of BaFe12O19,BaLa0.5Fe11.5O19 and BaLa0.5Fe11.5xO19/SiO2 are compared by vibrating sample magnetometer (VSM).The XRD patterns of BaLa0.5Fe11.5O19/SiO2 calcined at 1000℃ manifest that all the species have hexagonal crystal structure and no diffraction peaks of SiO2 are found.Compared with BaLa0.5Fe11.5O19 powders,those synthesized in the presence of SiO2 nanoparticles present in smaller powder size,as proved by SEM.The results of VSM reveal that BaLa0.5Fe11.5O19 possesses much higher saturation magnetization than BaFe12O19.BaLa0.5Fe11.5xO19/SiO2 also shows higher saturation magnetization than BaFe12O19,but lower than BaLa0.5Fe11.5O19 because of addition of nano-SiO2.
Hexaferrites Nanoparticles La substitution Magnetic properties
Zhi-dong Han Li-min Dong Ze Wu Xian-you Zhang
College of Materials Science and Engineering,Harbin University of Science and Technology,Harbin 150040,China
国际会议
The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))
长沙
英文
626-628
2007-05-10（万方平台首次上网日期，不代表论文的发表时间）