Dy^(3+)掺杂对BaFe_(12) O_(19)的微波电磁特性的影响  

Effects of Dy^(3+) substitution on microwave electro magnetic properties of BaFe_(12)O_(19)

作　　者：王洪洲[1] 王丽熙[1] 张晶[1] 黄啸谷[1] 张其土[1] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009

出　　处：《南京工业大学学报（自然科学版）》2012年第1期81-84,共4页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：江苏省高校自然科学基金资助项目(10KJB430008);总装预研基金资助项目(9140A××××6401)

摘　　要：采用固相法合成了稀土Dy^(3+)掺杂六角铁氧体Ba_(1-x)Dy_xFe_(12)O_(19)(x=0、0.04、0.06、0.08、0.10)。采用X线衍射仪(XRD)、扫描电镜(SEM)和网络分析仪对粉体的相组成、形貌和电磁特性进行表征。结果表明:当x≤0.08时,制得的粉体为单一的六角M型铁氧体;试样的颗粒粒径随着掺杂量的增加有所降低;在2～18 GHz频率范围内,当Dy^(3+)掺杂量x<0.08时,试样ε′、ε″、μ′、μ″和tanδ的数值随着掺杂量的增加均有所变大,并且利用微波电磁理论分析了磁导率和介电常数的变化机制。Barium hexaferrites doped with Dy^（3＋）,Ba_（1-x）Dy_xFe_（12）O_（19）（x =0,0.04,0.06,0.08,0.10） were prepared by the conventional ceramic technology.The phase composition,the morphology and the electromagnetic properties were characterized using X-ray diffraction（XRD）,scanning electron microscopy （SEM） and network analyzer.All the XRD patterns at x≤0.08,showed the single phase of the magnetoplumbite barium ferrite without other intermediate phases.The particles reduced in dimension with the increase of Dy^（3＋） substitution content.The microwave electromagnetic properties were investigated in the frequency range of 2～18 GHz.It was shown that all theε′,ε″μ′,μ″and tanδincreased slightly with Dy^（3＋） at x0.08.Finally,the reasons were discussed using electromagnetic theory.

关 键 词：钡六角铁氧体 稀土掺杂 微波电磁特性 

分 类 号：TM277[一般工业技术—材料科学与工程]