利用溶胶-凝胶自蔓延燃烧反应制备了Ni1-xZnxFe2O4(x=0.5,0.65和0.8)铁氧体纳米粉末,将粉末分别在室温、550、800和1050℃下退火2小时,研究了退火样品的晶体结构及其在0.1～1.5GHz波段的电磁性质.实验表明,选择合适的退火温度和适当的Zn2+掺杂量有助于提高纳米Ni-Zn铁氧体粉末的复介电常数和复磁导率,改善其阻抗匹配性,提高其吸波性能;而随着退火温度的升高,Zn2+掺杂量过多的样品的介电损耗虽略有增加,但磁损耗却随之减小,且试样的饱和磁化强度、剩磁及矫顽力均大幅下降.
参考文献
| [1] | Toni Maeda;Satoshi Sugimoto .Electromagnetic Microwave Absorption of #alpha# -Fe Microstructure Produced by Disproportionation Reaction of Sm_2Fe_(17) Compound[J].Materials transactions,2000(9):1172-1175. |
| [2] | Toru Maeda;Satoshi Sugimoto;Toshio Kagotani .Electromagnetic Microwave Absorption Properties of a Fine Structure Formed from the Sm_2Fe_(17) Compound after Disproportionation in Air or Nitrogen[J].Materials transactions,2001(3):446-449. |
| [3] | 范学伟,姚敏琪,舒扬,王倩,张晓宁.GHz铁氧体电磁波吸收材料的研究[J].宇航材料工艺,2004(03):30-33. |
| [4] | T.M. Meaz;S.M. Attia;A.M. Abo El Ata .Effect of tetravalent titanium ions substitution on the dielectric properties of Co-Zn ferrites[J].Journal of Magnetism and Magnetic Materials,2003(2/3):296-305. |
| [5] | 杨雪梅,王晨,李明.CNTs/Ferrite/PVDF复合材料的电磁波吸收特性[J].材料科学与工程学报,2008(02):213-216. |
| [6] | A. Dias;R.L. Moreira .Chemical, mechanical and dielectric properties after sintering of hydrothermal nickel-zinc ferrites[J].Materials Letters,1999(1):69-76. |
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