Sr^(2+)取代对Z型六角铁氧体性能的影响  

Effects of Sr Substitution on the Properties of Z-type Hexaferrite

作　　者：唐英明[1] 薛刚[1] 罗俊[1] 贾利军[1] 张怀武[1] 

机构地区：[1]电子科技大学电子薄膜与集成器件国家重点实验室,四川成都610054

出　　处：《磁性材料及器件》2010年第4期50-53,共4页Journal of Magnetic Materials and Devices

基　　金：国家自然科学基金资助项目(50872017);国家自然基金创新群体项目(60721001);国家自然际合作项目(2007DFR10250)

摘　　要：采用固相反应法制备Z型六角铁氧体(Ba1-xSrx)3Co2Fe24O41材料。研究了Sr2+取代对Z型六角铁氧体显微结构和电磁性能的影响。结果表明,Sr2+取代量x≤0.5时,随着取代量的增加,平均晶粒尺寸和烧结密度增加,1200℃烧结时,材料的起始磁导率从x=0的4.8增加到x=0.5的16.5,同时矫顽力减小;进一步增加取代量时,材料的起始磁导率下降,并且其矫顽力增大。x=0.5时,材料具备高的磁导率(1250℃烧结时为17)、较高的截止频率fr和磁品质因数Q,以及较低的矫顽力Hc。Z-type hexaferrite（Ba1-xSrx）3Co2Fe24O41 materials were prepared by solid-state method.The effects of Sr substitution on the microstructure and electromagnetic properties of Z-type hexaferrites were investigated.The results showed that when the amount of Sr substitution（x） is less than 0.5,the average grain size and the sintering density increase with x.The initial permeability increases from 4.8 for x=0 to 16.5 for x=0.5 sintering at 1200℃.Meanwhile,the coercivity decreases.A high permeability of 17（sintering at 1250℃）,high cut-off frequency,high Q-factor and low coercivity were obtained for the sample with x=0.5.

关 键 词：Z型六角铁氧体 Sr取代 电磁性能 显微结构 

分 类 号：TM277[一般工业技术—材料科学与工程]