摘要
采用高分子凝胶法制备了Ni0.5Zn0.5LaxFe2-xO4(x=0,0.05,0.1)铁氧体,采用XRD,TEM和HP8510网络分析仪对其结构、形貌、电磁和微波吸收性能进行了研究.结果表明,当煅烧温度为600℃时,立方晶系尖晶石结构的Ni0.5Zn0.5La0.05Fe1.95O4相初步形成,La在尖晶石结构中固溶量有限.与Ni0.5Zn0.5Fe2O4铁氧体相比,掺杂La的Ni-Zn铁氧体的tanδm值降低,tanδε值升高.与Ni0.5Zn0.5Fe2O4铁氧体相比,x=0.1样品的吸波性能降低,而x=0.05样品的吸波性能提高,其电磁波反射率小于-10dB的频宽可达2.7GHz,最小反射率为-15.6dB.
Ni0.5Zn0.5LaxFe2-xO4 （x=0, 0.05, 0.1） ferrite was prepared using polyacrylamide gel method. Its structural characteristics, morphology, electromagnetic and microwave absorption properties were analyzed by XRD, TEM, and HP8510 network analyzer. The results indicated that a pure spinel structure of Ni0.5Zn0.5La0.05Fe1.95O4 formed at 600 ℃. La^3＋ had limited solid solubility in the spinel lattice of La-doped Ni-Zn ferrites. The tanδm values of La-doped Ni-Zn ferrites were lower than that of the sample without La, but the tanδε values of La-doped Ni-Zn ferrites were higher than that without La doping in the X band. The microwave absorbing property was worse for the specimen at x=0.1 than that without doping, but better for the specimen at x=0.05 than that without doping. Its minimum reflection loss was -15.6 dB with a -10 dB bandwidth over the extended frequency range of 2.7 GHz.
出处
《过程工程学报》
EI
CAS
CSCD
北大核心
2008年第6期1237-1240,共4页
The Chinese Journal of Process Engineering
基金
科技部国际科技合作重点计划资助项目(编号:2004DFA04800)
关键词
镧
掺杂
镍锌铁氧体
微波吸收性能
lanthanum
doped
Ni-Zn ferrite
microwave absorbing property
作者简介
武小娟（1973-），女，山西省太古县人，硕士，讲师，主要从事功能材料研究，E-mail：zht95711@163．com．
