(浙江師范大學 化學系 浙江省固體表面反應化學重點實驗室，金華 321004)
摘 要: 采用化學共沉淀法制備鋅錳鎳鐵氧體納米粉體，用X射線衍射儀(XRD)、紅外光譜儀(FT-IR)、透射電鏡(TEM)和振動樣品磁強計(VSM)等表征產(chǎn)物的結構、形貌和磁性能。結果表明：鋅錳鎳鐵氧體的飽和磁化強度隨著鎳的相對含量(x)的增加呈現(xiàn)先緩慢增大(x=0~0.2)后急劇減小(x=0.2~0.3)然后再增大(x=0.3~0.4)的變化規(guī)律，這說明納米鐵氧體的磁性與其微觀結構、顆粒尺寸、晶界和結構缺陷等因素有關。
關鍵字: 鋅錳鎳鐵氧體；共沉淀法；納米粒子；飽和磁化強度
（Zhejiang Key Laboratory for Reactive Chemistry on Solid Surface, Department of Chemistry, Zhejiang Normal University, Jinhua 321004, China）
Abstract:The nano-sized Mn-Zn-Ni ferrites were prepared by co-precipitation method. The structures and ferromagnetic property of ferrite powders and nanocomposites were characterized by means of powder X-ray diffractometry, transmitted electron microscope, and vibrating sample magnetometer techniques, respectively. The results show that the magnetization of the Mn-Zn-Ni ferrites decreases in the beginning, then increases, and again decreases sharply with the increase of relative Ni content, which indicates that there are some factors giving the effect on the magnetic such as the microstructure, the grain size, crystal boundary and so on.
Key words: Mn-Zn-Ni ferrites; co-precipitation method; nano-sized particles; saturation magnetization
