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化学学报
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化学学报 ›› 2006, Vol. 64 ›› Issue (2): 151-157. 上一篇    下一篇

研究论文

掺杂Co2+和Sm3+对纳米ZnFe2O4铁氧体的电磁损耗特性的影响

庄稼   

  1. 四川绵阳西南科技大学材料学院
  • 投稿日期:2005-03-14 修回日期:1900-01-01 发布日期:2006-01-28
  • 通讯作者: 庄稼

Effect of Sm- and Co- doped ZnFe2O4 Nano-particles on Electromagnetic Loss Property

  • Received:2005-03-14 Revised:1900-01-01 Published:2006-01-28

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采用NaHCO3与FeCl3•6H2O，ZnSO4•7H2O，Co(NO3)2•6H2O和Sm(NO3)3•6H2O进行室温固相反应制得碱式碳酸盐和氢氧化铁混合前驱物，先微波加热，再热分解分别制得复合氧化物ZnFe2O4、Co0.5Zn0.5Fe2O4和Co0.5Zn0.5Fe1.95Sm0.05O4。由激光粒度分析仪、XRD和SEM表征：获得了颗粒分布均匀、平均粒度为62nm左右、立方晶系尖晶石结构的纳米铁氧体粉体。经测试样品的相对介电常数和相对磁导率后，研究了它们的电磁损耗特性。结果表明：在ZnFe2O4中，掺入Co2+、Sm3+元素可以在100~1800MHz测试频率范围内不同程度提高材料的电磁损耗特性。

关键词: 纳米铁氧体, 稀土掺杂, 固相合成, 电磁损耗

The precursors of basic carbonates and ferric hydrate for ferrite were prepared by solid-state reaction at room temperature and characterized by TG-DSC. The nanometer spinel ferrites with the average size of 62nm were obtained by microwave heating at 600W and 10min and thermolysis at 550℃ and were studied by Laser Granularity Analyzer, XRD and SEM. The electromagnetic loss property was studied by the relative dielectric constant and relative magnetic permeability of the ferrites. The results show that Co2+ substituted partially Zn2+ in ZnFe2O4 that can improve observably the electromagnetic loss property of materials in 100~1800MHz and that Fe3+ was substituted small by Sm3+ in Co0.5Zn0.5Fe2O4 that can increase properly the electromagnetic loss property of materials in 100~1800MHz.

Key words: nano-ferrite, rare earth-doped, solid-state synthesis, electromagnetic loss