水热合成的纳米晶Ni_(0.6)Zn_(0.4)Fe_2O_4铁氧体的微波退火与磁性能  

Microwave annealing and magnetic properties of Ni_(0.6)Zn_(0.4)Fe_2O_4 ferrite nano-crystalline via hydrothermal synthesis

作　　者：章成文[1] 朱德如[2] 刘先松[2] 

机构地区：[1]铜陵学院电气工程系,安徽铜陵244000 [2]磁性材料安徽省工程技术研究中心安徽大学物理与材料科学学院,安徽合肥230039

出　　处：《磁性材料及器件》2011年第4期26-27,42,共3页Journal of Magnetic Materials and Devices

基　　金：安徽省级优秀青年人才基金资助项目(2010SQRL171)

摘　　要：采用水热法在180℃下合成了纳米级的尖晶石相Ni0.6Zn0.4Fe2O4铁氧体,并在家用微波炉(2.45 GHz、800 W)中退火10min。XRD分析表明,180℃水热合成的纳米晶Ni0.6Zn0.4Fe2O4铁氧体为单一尖晶石相,高分辨透射电镜照片分析表明Ni0.6Zn0.4Fe2O4颗粒晶格结构完整,颗粒均匀,尺寸在20nm左右。微波退火处理对Ni0.6Zn0.4Fe2O4颗粒形貌和粒径影响很小。水热合成的Ni0.6Zn0.4Fe2O4铁氧体的比饱和磁化强度Ms和矫顽力Hc分别为11.9 A.m2/kg和7.44 kA/m,经过微波退火处理后其饱和磁化强度Ms和矫顽力Hc分别增大到54.6 A.m2/kg和13.97 kA/m。Nanosized Nio.6Zn0.4Fe2O4 spinel-ferrite powder was synthesized by hydrothermal synthesis method at 180℃, then, a part of Ni0.6Zn0.4Fe2O4 powder was annealing in home microwave oven （2.45 GHz, 800 W） for 10 rain. XRD spectra showed that Ni0.6Zn0.4Fe2O4 powder has structure of single spinel phase, and the HRTEM images showed that the nanoparticles are about 20 nm in average diameter. Moreover, the microwave annealing has slight effect on its morphology and particle size. The saturation magnetization Ms and the coercive force He of as-prepared Ni0.6Zn0.4Fe2O4 ferrite powder is 11.9 A.m：/kg and 7.44 kA/m, respectively. However, after microwave annealing, the saturation mitgnetization M, and the coercive force Hc of Ni0.6Zn0.4Fe2O4 ferrite powder increase to 54.6 A.m2/kg and 13.97 kA/m. Key words： NiZn ferrite; hydrothermal method; microwave annealing; magnetic properties

关 键 词：镍锌铁氧体 水热法 微波退火 磁性能 

分 类 号：TM277.1[一般工业技术—材料科学与工程]