La-Co取代M型锶铁氧体的制备及性能  

Preparation and properties of La-Co substituted M-type strontium ferrite

作　　者：谢光环 孙威 曹玉杰 张鹏杰 王继全 全小康 刘辉 XIE Guang-huan;SUN Wei;CAO Yu-jie;ZHANG Peng-jie;WANG Ji-quan;QUAN Xiao-kang;LIU Hui(BGRIMM Technology Group,Beijing 100160,China;BGRIMM Magnetic Materials and Technology(Fuyang)Co.Ltd.,Fuyang 236000,Anhui,China;National Engineering Research Center for Magnetic Materials,Beijing 102600,China)

机构地区：[1]矿冶科技集团有限公司,北京100160 [2]北矿磁材(阜阳)有限公司,安徽阜阳236000 [3]国家磁性材料工程技术研究中心,北京102600

出　　处：《矿冶》2022年第4期95-101,共7页Mining And Metallurgy

基　　金：国家重点研发计划项目(2021YFB3502400)。

摘　　要：采用固相球磨法制备La-Co取代系M型锶铁氧体。对比研究了单独添加Co和La、Co同时添加对铁氧体性能的影响,La-Co取代量对样品晶体结构、微观形貌和磁性能的影响。结果表明:Co^(2+)单一取代和La、Co联合取代均会引起样品晶格常数的变化,所制备的M型锶铁氧体均形成了六角片状结构;与Co^(2+)单一取代相比,La、Co联合取代可有效抑制微粒的长大,且分布均匀;当M型锶铁氧体的理论化学式为Sr_(0.6)La 0.4 Fe_(11.7)Co_(0.3)O_(19)时,样品的H_(cj)最大,达到407 kA/m,较锶铁氧体SrFe_(12)O_(_(19))的H_(cj)提高88.65%。M-type strontium ferrite of La-Co substitution system was prepared by solid-state ball milling.The effects of La-Co substitution on the crystal structure,microstructure and magnetic properties of the samples were studied.The results show that the single substitution of Co^(2+)and the combined substitution of La and Co will change the lattice constant of the samples,and the M-type strontium ferrite forms a hexagonal sheet structure.Compared with the single substitution of Co^(2+),La and Co combined substitution can effectively inhibit the growth of particles and distribute evenly.When the chemical composition of M-type strontium ferrite is Sr_(0.6)La_(0.4)Fe_(11.7)Co_(0.3)O_(19),the H_(cj)of the sample is the largest,reaching 407 kA/m,which is 88.65%higher than that of strontium ferrite SrFe_(12)O_(_(19)).

关 键 词：M型锶铁氧体 固相球磨法 La-Co取代 磁性能 

分 类 号：TM277[一般工业技术—材料科学与工程]