摘要
首先利用溶胶-凝胶法制备了BaxNi1–xFe12O19(x=0.2,0.4,0.6,0.8)样品,通过热重-差示扫描量热仪(TG-DSC)、X射线衍射仪(XRD)和振动试样磁强计(VSM)分析,确定了最佳煅烧温度和最佳Ba-Ni摩尔比。然后利用同样的方法制备了Ba0.6Ni0.4LayFe12–yO19(y=0,0.1,0.3,0.5)样品,利用场发射扫描电镜(FESEM)、XRD和VSM对产物进行表征分析。结果表明Ni2+取代Ba2+,进入其晶格内部,改变了铁氧体的磁性能。La3+的加入改变了铁氧体的矫顽力Hc、饱和磁化强度Ms和剩余磁化强度Mr。当y=0.3时,其Ms和Mr达到最大值,分别为51.0 A.m2/kg和32.3 A·m2/kg。
BaxNi1-xFe12O19 （x = 0.2, 0.4, 0.6, 0.8） was prepared by sol-gel process. The optimum calcinations temperature was determined by means of TG-DSC and X-ray diffraction （XRD）. The optimum molar ratio of the Ba to Ni was chosen by analyzing the data of vibrating sample magnetometer （VSM）. Ba0.6Ni0.4LayFe12-yO19 （y = 0, 0.1, 0.3, 0.5） samples was prepared by the same preparation method. The composition, microstructure, grain size and morphology of the products were characterized and analyzed through XRD, field emission scanning electron microscope （FESEM） and VSM. The results show that Ni2＋ comes into the crystal lattice, and affects the magnetic properties of ferrite. The coercive force He, saturated magnetization Ms and remanent magnetization Mr are changed when La3＋ is added. The Ms and Mrcan reach the maximum value ofS1.0 A . m2/kg and 32.3 A. m2/kg wheny is 0.3.
出处
《电子元件与材料》
CAS
CSCD
北大核心
2013年第6期38-41,共4页
Electronic Components And Materials
基金
武汉理工大学国家级大学生创新创业训练计划资助项目(No.20121049701016)
