合成条件对化学共沉淀法制备NiCuZn铁氧体磁性能的影响  

Effects of Synthetic Conditions on Magnetic Properties of NiCuZn Ferrite Prepared by Chemical Co-Precipitation

作　　者：陈辉[1] 代建清[1] 周小兵[1] 

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093

出　　处：《昆明理工大学学报（理工版）》2010年第2期27-32,共6页Journal of Kunming University of Science and Technology(Natural Science Edition)

基　　金：云南省中青年学术技术带头人后备人才培养项目(项目编号:2006PY01-09)

摘　　要：利用化学共沉淀法制备了Ni0.25Cu0.25Zn0.5Fe2O4铁氧体粉体,研究了合成条件对样品粒径和磁性能的影响.通过XRD、SEM、激光粒度仪(LPS)等测试手段分析了其相结构和微观形貌,用振动样品磁强计(VSM)测量了其室温下磁性能.结果表明:化学共沉淀法合成的NiCuZn铁氧体粉体为纯相的尖晶石型结构,平均颗粒尺寸为2.3μm,平均晶粒尺寸为15 nm.样品的平均颗粒尺寸随反应温度的升高而减小,随盐溶液流速和搅拌速率的增大而增大.样品的磁性能随反应温度和搅拌速率的增大由顺磁性转变为软磁性,而盐溶液流速增大时仍为顺磁性.Ni0.25Cu0.25Zn0.5Fe2O4 ferrite powder is successfully prepared by chemical co-precipitation method and the effects of synthetic conditions on NiCuZn ferrite are studied. The phase structure and micro-morphology of the powder are analyzed by X-ray diffraction （XRD）, scanning electron microscope （SEM） and laser particle sizer （LPS）. The magnetic properties of samples are then investigated with vibrating sample magnetometer （VSM） at room temperature. It is shown through the results that the NiCuZn ferrite powder prepared by co-precipitation method is pure spinel. The particle size of sample is about 2.3μm and the grain size is about 15nm. The particle size of samples increases with the increase of flow speed and stirring rate, while it decreases with the increase of reaction temperature. The magnetic properties of samples change from paramagnetism to soft magnetism with the increase of reaction temperature and stirring rate, but remain paramagnetism with the increase of flow speed.

关 键 词：化学共沉淀法 NICUZN铁氧体 磁性能 

分 类 号：TM228[一般工业技术—材料科学与工程]