软磁化BaM的高频电磁波吸收性能  

High-frequency Electromagnetic Wave Absorption Properties of Soft Magnetic BaM

作　　者：朱昊 张燕[1] 朱欣欣[1] 钟佳利 徐涵 代波[1] 任勇[1] 

机构地区：[1]四川省非金属复合与功能材料重点实验室-省部共建国家重点实验室培育基地西南科技大学,四川绵阳621010

出　　处：《精细化工》2017年第11期1208-1212,共5页Fine Chemicals

基　　金：四川省青年科技创新研究团队专项计划项目(No.2017TD0020);西南科技大学四川省非金属复合与功能材料重点实验室基金项目(No.14tdfk07;15zxfk10);2016年度四川省博士后科研项目特别资助项目~~

摘　　要：采用固相法制备了BaM和Mn-Co-Zr三元离子掺杂BaM(BaFe_(9.6)Mn_(0.6)Co_(0.6)Zr_(1.2)O_(19))粉体,并考察了烧结温度和掺杂对BaM结构和磁性的影响。利用X射线衍射仪(XRD)和扫描电镜(SEM)对其结构和形貌进行表征,结果表明,掺杂前后粉体均为纯相M型钡铁氧体,掺杂有利于颗粒细化,且尺寸均匀,最佳烧结温度为1 300℃。采用振动样品磁强计(VSM)和矢量网络分析仪(VNA)测定其静态和动态磁性能,VSM结果表明,Mn-Co-Zr掺杂使BaM从典型永磁材料变为软磁材料,矫顽力最低为50.4 Oe。软磁化的BaM仍然比尖晶石铁氧体具有更高的磁各向异性,VNA测试发现,烧结温度1 250℃的掺杂BaM其共振频率高达16 GHz,拟合得到最强电磁波吸收在14.3 GHz达到-57.6 d B。M-type barium ferrite（BaM） and Mn-Co-Zr-doped BaM（BaFe（9.6）Mn（0.6）Co（0.6）Zr（1.2）O（19））powders were prepared by solid phase method.The effects of sintering temperature and Mn-Co-Zr ions doping on the structure and magnetic properties of BaM were investigated.The structure and morphology of samples were investigated by X-ray diffraction（XRD） and scanning electron microscope（SEM）.The results showed that the powders before and after doping were pure phase M type barium ferrite,and doping was beneficial to grain size refinement and uniform.The optimum sintering temperature was 1 300 ℃.The static and dynamic magnetic properties were studied by vibrating sample magnetometer（VSM） and vector network analyzer（VNA）.The VSM measurements indicated that Mn-Co-Zr ions doping made BaM from typical permanent magnet materials to soft magnetic materials,and the coercivity minimum was 50.4 Oe.The soft magnetic BaM exhibited a higher magnetic anisotropy than spinel type ferrite.In addition,the VNA tests revealed that the resonant frequency was as high as 16 GHz,and the maximum reflection loss to electromagnetic wave was up to-57.6 d B at a frequency of 14.3 GHz for the doped BaM.

关 键 词：固相法 掺杂 M型钡铁氧体 功能材料 

分 类 号：TM277.2[一般工业技术—材料科学与工程]