NiFe_2O_4/T-ZnO_w复合材料的制备及磁性能  

Preparation and magnetic properties of NiFe_2O_4/T-ZnO_w composites

作　　者：王承[1] 于美[1] 薛峰[1] 刘建华[1] 李松梅[1] 

机构地区：[1]北京航空航天大学材料科学与工程学院,北京100191

出　　处：《复合材料学报》2010年第4期21-25,共5页Acta Materiae Compositae Sinica

基　　金：中央高校基本科研业务费专项资金

摘　　要：采用化学镀法在四角氧化锌晶须(T-ZnO_W)表面包覆NiFe_2O_4镀层,制备了NiFe_2O_4/T-ZnO_W复合材料。利用X射线衍射仪、扫描电镜、能谱分析仪、振动样品磁强计对镀覆前后T-ZnOw的结构、形貌等进行了表征。结果表明,化学镀覆后,在T-ZnO_W表面包覆了致密的尖晶石型NiFe_2O_4镀层,T-ZnO_W针尖部位生成的镀层厚度比根部薄。NiFe_2O_4/T-ZnO_W复合材料具有软磁特性。随着退火温度的升高,复合材料的饱和磁化强度和矫顽力逐渐升高,在800℃达到最高。NiFe2O4/T-ZnOw composites were prepaired by encapsulating T-ZnOw with an NiFe2O4 film through ferrite electrodeless plating. The composites were characterized by X- ray analyses （XRD）, scanning electron microscopy （SEM） and energy dispersion spectroscopy （EDS）. The magnetic properties were measured by vibrating sample magnetometer （VSM）. The results indicate that the surface of T-ZnOw is covered with a compact layer of NiFe2O4, and the coating on the needlepoint is thinner than that on the root of T-ZnOw. The composites exhibit excellent ferromagnetic behavior. The saturation magnetization and coercive force increase with the annealing temperature, and reach the peak at 800 ℃.

关 键 词：吸波材料 四角氧化锌晶须 镍铁氧体 化学镀 磁性能 

分 类 号：O641[理学—物理化学]