摘要
利用溶胶．凝胶法制备出性能优良的Sr1-xLaxFe12-xCoxO19（x=0-0.5）铁氧体，研究了La、Co掺杂量对铁氧体结构和磁学性能的影响。XRD结果显示，对x≤0．3样品均得到单一的M相，而x=0．4样品出现了CoFe2O4相，x=0．5样品出现了CoFe2O4相和LaFeO3相。VSM结果显示，在适当的代换量（X=0=0.2）范围，剩余磁感应强度增加，同时矫顽力也增加。x=0．2样品的Br、Hc和σs最大值分别为449mT、562．5kA／m和68Am2／kg,与未掺杂样品相比，La3＋、Co2＋的加入能明显提高样品的综合磁性能。
Sr1-xLaxFe12-xCoxO19（x=0-0.5） hexaferrite nanoparticles were prepared by chemical sol-gel route, and the dependence of microstructure and magnetic property on the substitution content was studied. XRD experimental results showned that the samples exhibit single hexagonal magnetoplumbite phase up to x=0.3, but CoFe2O4 phase appears at x=0.4, CoFe2O4 phase and LaFeO3 phase appears at x=0.5. At the same time, VSM experimental results showed that for an amount of substitution （x=0--0.2）, both the residual magnetic induction and coercivity increase for x=0.2 sample, the maximum value of Br, He and σs were 449mT, 562.5kA/m and 68Am2/kg, respectively. In comparison with the pure SrFe12O19, the substitution of La3＋and Co2＋ obviously increases the magnetic properties of the as-prepared samples.
出处
《磁性材料及器件》
CAS
CSCD
北大核心
2009年第3期32-34,45,共4页
Journal of Magnetic Materials and Devices
关键词
锶铁氧体
掺杂
相变
磁性能
strontium hexaferrite
substitution
phase transition
magnetic properties
