微波辅助溶胶-凝胶法合成纳米晶锶铁氧体及其磁性能  

Study on Nano-Crystalline of SrFe_(12)O_(19) Synthesized by Microwave-Assisted Sol-Gel Method and Its Magnetic Properties

作　　者：周丹[1] 刘先松[1] 邱士星[1] 贾道宁[1] 

机构地区：[1]安徽大学磁性材料安徽省工程技术研究中心,安徽合肥230039

出　　处：《稀有金属材料与工程》2010年第A01期113-116,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金资助项目(50672001)

摘　　要：利用微波辅助溶胶-凝胶法合成了M型SrFe12O19纳米晶铁氧体。借助XRD、SEM和VSM等技术,对合成纳米晶的物相、微观结构及其磁性能进行了研究。结果表明,当煅烧温度为900℃以上时,M型SrFe12O19微粒保持为单一的六方磁铅石型结构;温度在1100℃时,得到平均晶粒100～150nm的六角型锶铁氧体;温度为800℃时,其矫顽力达到最大为HC=399.78kA/m,比饱和磁化强度为σs=57.97A·m2·kg-1。Nano-crystalline of M-type Sr-ferrites SrFe12019 were fabricated by microwave-assisted sol-gel technique. The phase, microstructure and magnetic properties of the as-synthesized samples were characterized by X-ray diffraction （XRD）, filed-emission scanning electronic microscope（FESEM） and vibrating sample magnetometer（VSM）. The results show that the M-type SrFe12O19 keeps a single hexagonal magnetoplumbite structure above 900℃; the average size of the as-synthesized sample was about 100-150 nm at 1100 ℃; the maximum coercivity （He） was gained at 800 ℃, which was 399.78 kA/m, and the saturation magnetization value （as） was 57.97 A·m^2·kg^-1.

关 键 词：微波 溶胶-凝胶法 磁性能 

分 类 号：TM277[一般工业技术—材料科学与工程]