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›› 2007, Vol. 7 ›› Issue (3): 610-614.

• 材料工程专栏 • 上一篇    下一篇

纳米晶Ni0.5Zn0.5Fe2O4的制备及微波性能

马瑞廷,邵忠财,张春丽,李红,田彦文   

  1. 沈阳理工大学材料学院
  • 出版日期:2007-06-20 发布日期:2007-06-20

Preparation and Microwave Properties of Ni0.5Zn0.5Fe2O4 Nanocrystalline Powder Prepared by Polyacrylamide Gel Process

MA Rui-ting,SHAO Zhong-cai,ZHANG Chun-li,LI Hong,TIAN Yan-wen   

  1. Materials Science and Engineering College, ShenYang LiGong University
  • Online:2007-06-20 Published:2007-06-20

摘要: 以丙烯酰胺为聚合单体,N,N-亚甲基双丙烯酰胺为网络剂,采用高分子凝胶法制备了尖晶石型Ni0.5Zn0.5Fe2O4纳米晶. 采用FT-IR, XRD, TEM和波导等方法对产物及其电磁性能进行了表征. 结果表明,干凝胶为无定型状态,当煅烧温度为600℃时,形成结晶完整的尖晶石型Ni0.5Zn0.5Fe2O4纳米晶. 煅烧温度为600和800℃时,由透射电镜照片可知,粉体平均粒径约为10和30 nm,红外光谱显示金属?氧离子(M?O)键的特征吸收峰红移23 cm-1;纳米晶体在8.2~11 GHz的测试频率范围内具有介电损耗和磁损耗,复介电常数和复数磁导率变化都比较平稳,随煅烧温度升高而增大.

关键词: 高分子凝胶法, 纳米晶体, Ni0.5Zn0.5Fe2O4, 微波性能, 制备

Abstract: Nanocrystalline Ni0.5Zn0.5Fe2O4 powder was prepared using polyacrylamide gel method with acrylamide as monomer and N,N'-methylenediacrylamide as lattice agent. The analysis methods of Fourier transform infrared spectrometer (FI-IR), X-ray diffraction (XRD), transmission electron microscopy (TEM) and wave-guide were used to characterize the gel and the products after calcining. The XRD study shows that the dried gel is amorphous, the spinel Ni0.5Zn0.5Fe2O4 forms at and above 400℃. The grain size and the M?O metal and oxygen characteristic absorption bonds are dependant on heat treatment temperature. When the calcining temperatures are 600 and 800℃, the grain sizes are 10 and 30 nm identified by TEM, respectively. The FT-IR spectra illustrate that the M?O characteristic absorption bonds shift from 590 to 613 cm-1 when the calcining temperature is shifted from 400 to 800℃. The nanocrystalline Ni0.5Zn0.5Fe2O4 has both dielectric loss and magnetic loss, while the complex permittivity and complex permeability of Ni0.5Zn0.5Fe2O4 increase with increasing the heat treatment temperature in the frequency range of measurement.

Key words: polyacrylamide gel, nanocrystal, Ni0.5Zn0.5Fe2O4, microwave properties, preparation