摘要
用水热法分别在200℃和220℃下反应5h制备了纳米级镍锌铁氧体(Ni0.5Zn0.5Fe2O4)粉体。用X射线衍射(X-ray diffraction,XRD)分析合成的纳米Ni0.5Zn0.5Fe2O4的物相,结果表明:200℃水热反应5h得到的纳米Ni0.5Zn0.5Fe2O4粉体中含有γ-Fe2O3,220℃水热反应5h可以得到纯纳米Ni0.5Zn0.5Fe2O4粉体。用透射电镜(transmission electronmicroscope,TEM)、Mssbauer谱(Mssbauer spectroscopy,MS)、Fourier红外分析(Fourier transform infrared spectroscopy,FTIR)、振动样品磁强计(vibrating sample magnetometer,VSM)等方法表征纯纳米Ni0.5Zn0.5Fe2O4粉体。TEM结果表明:纳米Ni0.5Zn0.5Fe2O4粉体粒子为球形,粒径约为20nm。室温MS结果表明:大部分纳米Ni0.5Zn0.5Fe2O4粉体粒子表现出铁磁性,少量的表现出超顺磁性。FTIR分析表明:样品在577cm-1和420cm-1处出现NiZn铁氧体的特征峰。磁滞回线结果表明:纳米Ni0.5Zn0.5Fe2O4粉体粒子的饱和磁化强度为38.14A?m2/kg,剩磁为17.32A?m2/kg,矫顽力为29275.29A/m。
Nanosized nickel zinc ferrite （Ni0.5Zn0.5Fe2O4） powder was synthesized by the hydrothermal synthesis method at 200℃ and 220 ℃ for 5 h, respectively. An X-ray diffraction （XRD） was adopted for the characterization of Ni0.5Zn0.5Fe2O4 powder. It is concluded that the Ni0.5Zn0.5Fe2O4 powder contained 7zFe203 when it is synthesized at 200℃ for 5 h, and pure Ni0.5Zn0.5Fe2O4 powder were prepared by the hydrothermal synthesis at 220℃ for 5 h. The pure powder was characterized by a transmission electron microscope （TEM）, M6ssbauer spectrum （MS）, Fourier transform spectroscopy （FTIR）, and magnometry using a vibrating sample magnetometer （VSM）. The TEM results show that Ni0.5Zn0.5Fe2O4 nanoparticles are round, and are about 20 nm in diameter. The MS results reveal that most of the Ni0.5Zn0.5Fe2O4 nanoparticles show ferromagnetism and a small quantity of Ni0.5Zn0.5Fe2O4 exhibit superparamagnetic relaxation. The FTIR results show that the bands at 577 cm^-1 and 420 cm^-1 are the characteristic bands of NiZn ferrite. The saturated magnetization, remanence and coercivity of Ni0.5Zn0.5Fe2O4 powder are 38.14 A.m^2/kg, 17.32 A.m^2/kg and 29 275.29 A/m, respectively. The powder exhibits good magnetic properties.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2007年第6期713-716,共4页
Journal of The Chinese Ceramic Society
基金
深圳大学科研(4CHQ)资助项目
关键词
镍锌铁氧体
制备
磁性
水热法
nickel zinc ferrite
synthesis
magnetic property
hydrothermal method
