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采用溶胶-凝胶法制备了系列Ni_(1-x)Zn_xFe_2O_4(x=0,0.2,0.4,0.6,0.8,1.0)粉末样品,利用X射线衍射(XRD)、场发射扫描电镜(FESEM)和振动样品磁强计(VSM)对样品的晶体结构、形貌及磁性进行了研究.结果表明,750℃是制备样品的最佳煅烧温度,在此温度下制备的Ni_(1-x)Zn_xFe_2O_4均为单一尖晶石相.NiFe2O4纳米颗粒类似球形,大小均匀且分散性好;掺杂Zn~(2+)后,颗粒尺寸增大,有少量团聚.随着Zn~(2+)含量的增加,饱和磁化强度(Ms)先增大后减小,在x=0.4时达最大值,Ms=65.63emu·g~(-1);矫顽力Hc呈现持续降低趋势,x=0时有较高的矫顽力,Hc=196.09Oe.
A series of Ni_ (1-x) Zn_xFe_2O_4 (x = 0,0.2,0.4,0.6,0.8,1.0) powder samples were prepared by sol-gel method. The XRD patterns, field emission scanning electron microscopy The crystal structure, morphology and magnetic properties of the sample were investigated by vibrating sample magnetometer (VSM). The results show that 750 ℃ is the best calcination temperature for the prepared sample. The Ni_ (1-x) Zn_xFe_2O_4 The single spinel phase.NiFe2O4nanoparticles are spherical, uniform in size and good in dispersibility.When doped with Zn ~ (2+), the size of the particles increases with a little agglomeration.With the increase of Zn ~ (2+) content, , The saturation magnetization (Ms) first increases and then decreases, reaching the maximum value at x = 0.4, Ms = 65.63emu · g -1; coercivity Hc shows a continuous decreasing trend; at x = 0, High coercivity, Hc = 196.09Oe.