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›› 2008, Vol. 8 ›› Issue (6): 1237-1240.

• 材料工程专栏 • 上一篇    下一篇

La掺杂Ni0.5Zn0.5Fe2O4铁氧体的制备与微波吸收性能

武小娟 赵海涛 张罡 马瑞廷   

  1. 沈阳理工大学材料科学与工程学院 沈阳理工大学 沈阳理工大学材料科学与工程学院 沈阳理工大学材料学院
  • 收稿日期:2008-09-01 修回日期:2008-10-28 出版日期:2008-12-20 发布日期:2008-12-20
  • 通讯作者: 武小娟

Preparation and Microwave Absorption Properties of Ni0.5Zn0.5Fe2O4 Doped with Lanthanum

WU Xiao-juan ZHAO Hai-tao ZHANG Gang MA Rui-ting   

  1. School of Materials Science and Enginering , ShenyangLigong University School of Materials Science and Enginering , ShenyangLigong University Materials Science and Engineering College, ShenYang LiGong University
  • Received:2008-09-01 Revised:2008-10-28 Online:2008-12-20 Published:2008-12-20
  • Contact: WU Xiao-juan

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被引次数

14

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tandm值降低，tande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-10 dB的频宽可达2.7 GHz，最小反射率为-15.6 dB.

关键词: 镧, 掺杂, 镍锌铁氧体, 微波吸收性能

Abstract: 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℃. La3+ had limited solid solubility in the spinel lattice of La-doped Ni-Zn ferrites. The tandm values of La-doped Ni-Zn ferrites were lower than that of the sample without La, but the tande 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.

Key words: lanthanum, doped, Ni-Zn ferrite, microwave absorbing property

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