水热法合成镧掺杂锶铁氧体及其磁性能研究  

Synthesis and Magnetic Properties of La-Doped Strontium Ferrite by Hydrothermal Method

作　　者：施刘健 周林[1] 夏晓祥 晋传贵[1] 

机构地区：[1]安徽工业大学材料科学与工程学院,安徽马鞍山243032

出　　处：《铜业工程》2016年第6期52-55,共4页Copper Engineering

基　　金：国家自然科学基金资助项目(21071003;51201002);研究生创新研究基金(2014078)

摘　　要：采用水热合成法制备La^(3+)掺杂后的锶铁氧体(La_xSr_(1-x)Fe_(12)O_(19))颗粒,其中掺杂比x分别为0.00、0.05、0.10、0.15、0.20、0.30。借助X射线衍射(XRD)、扫描电子显微镜(SEM)和振动样品磁强计(VSM)等分析手段对La_xSr_(1-x)Fe_(12)O_(19)的结构、形貌和磁性能进行了表征与分析。XRD分析结果表明:掺杂后的样品晶粒尺寸均比纯相小,掺杂La^(3+)可以细化晶粒。SEM的观测结果表明:不同掺杂比下制备的样品均出现了典型的片状六角结构。VSM测量结果表明:当掺杂比x=0.10时,其饱和磁化强度Ms达到最小值51.23emu/g;掺杂后样品的剩余磁化强度Mr均比未掺杂的大,矫顽力Hc也随掺杂量增大而逐渐减小。La3＋ doped strontium ferrite （LaxSr1-xFe12O19） particles were prepared by hydrothermal method when the doping ratio x was 0.00, 0.05, 0.10, 0.15, 0.20, 0.30, respectively. The structures, morphologies and magnetic properties of LaxSr1-xFe12O19 were characterized and analyzed by x-ray diffraction （XRD）, scanning electron microscope （SEM） and vibrating sample magnetometer （VSM）. XRD analysis showed that doping La3＋ can refined grains, and the grain size of the doped samples was smaller than the pure phase. SEM observation results show that all as-prepared samples exhibited typical hexagonal structures. VSM measurement results showed that the minimum saturation magnetization （Ms） of all as-prepared samples was 51.23 emu/g with the doping ratio x was 0. 10. And the remanent magnetization （Mr） of all doped samples were smaller than the pure phase, while the coercivity Hc decreased gradually with the increase of doping ratio x.

关 键 词：锶铁氧体 水热法 掺杂 表征 分析 

分 类 号：TM277[一般工业技术—材料科学与工程]