Mg-Co-Ti共掺杂对M型钡铁氧体磁性能的影响  

Effect of Mg-Co-Ti Codoping on Magnetic Properties of M-type Barium Ferrite

作　　者：薛世波 王哲 孙瑞瑞 郭广磊 XUE Shi-bo;WANG Zhe;SUN Rui-rui;GUO Guang-lei(Department of Mathematics and Physics,Luoyang Institute of Science and Technology,Luoyang 471023,China)

机构地区：[1]洛阳理工学院数学与物理教学部,河南洛阳471023

出　　处：《广州化学》2023年第3期59-61,共3页Guangzhou Chemistry

基　　金：洛阳理工学院挑战杯项目;河南省教育厅项目(No.23B140015)。

摘　　要：采用溶胶-凝胶方法制备了不同Mg-Co-Ti掺杂量的Ba(MgCo)_(x/2)TixFe_(11.5−2)xO_(19)磁性粉体,运用XRD和SEM对样品成分及颗粒大小进行了表征,并运用VSM测试了样品的磁性能。结果表明:所制备的粉体1100℃煅烧2小时,粉体结晶良好,呈纯相结构,粉体颗粒大小平均在250 nm左右。随着掺杂含量x从0.1增加到0.6,矫顽力Hc从342 kA/m下降至143 kA/m,而饱和磁化强度Ms先增加,随后降低,在x=0.3时获得最大Ms为55.27 Am^(2)/kg。剩余磁化强度Mr,随着掺杂含量x的增加,先增加,然后逐渐减少。当x=0.3时剩余磁化强度最大值为30.90 Am^(2)/kg。研究表明,可以通过在Fe位掺杂不同含量的Mg-Co-Ti,调整钡铁氧体的磁性能,以适应不同的应用需求。Ba(MgCo)_(x/2)TixFe_(11.5−2x)O_(19)magnetic powders with different Mg-Co-Ti doping content were prepared by sol-gel method.The composition and particle size of the samples were characterized by XRD and SEM,and the magnetic properties of the related samples were tested by VSM.The results show that the crystal of the powder have a pure phase structure indicating well-crystallized when the powder was calcined at 1100℃for 2 hours.The average particle size was about 250 nm.With the doping content x increasing from 0.1 to 0.6,the coercivity(Hc)decreases from 342 kA/m to 143 kA/m,while the saturation magnetization(Ms)first increases,and then decreases.The maximum Ms obtained is 55.27 Am^(2)/kg at x=0.3.In addition,the remanent magnetization Mr increases initially and then decreases continuously with the increase of doping content x.The remanent magnetization Mr is 30.90 Am^(2)/kg when x is 0.3.This study shows that the magnetism of barium ferrite can be adjusted to meet the application requirements by doping different Mg-Co-Ti contents at the Fe site.

关 键 词：钡铁氧体 溶胶-凝胶 共掺杂 磁性能 矫顽力 饱和磁化强度 剩余磁化强度 

分 类 号：O469[理学—凝聚态物理]