| 镍锌铁氧体/膨胀石墨/聚苯胺复合物的电磁损耗性能 |
| Preparation and Electromagnetic Loss Properties of Nickel-Zinc Ferrite Expanded Graphite Polyaniline Composites |
|
| 摘要: 用化学共沉淀法和原位乳液聚合法分别制备了镍锌铁氧体(NixZn1-xFe2O4)、Ni0.7Zn0.3Fe2O4/膨胀石墨(NZF/EG)二元复合物及其聚苯胺(PANI)包覆的三元复合物(NZF/EG/PANI).用现代测试技术表征了样品的组成、结构、形貌和电磁性能.结果表明,NZF粒子较好地嵌入到EG的层间,PANI对NZF/EG的包覆效果良好;三元复合物的磁性能随磁性组分含量的减小而减弱,而电导率与EG和PANI的导电性及其相对含量相关联;复合物的电磁损耗性能优良,其中三元复合物优于二元复合物.含PANI70wt%的NZF/EG/PANI三元复合物,制样厚度分别为1.5、2.0和2.5mm时,其反射损耗峰值(有效带宽)分别为-19.99dB(5.82GHz),-20.33dB(4.08GHz)和-25.28dB(3.67GHz),具有优良的电磁波吸收效果. |
| 关键词: 镍锌铁氧体 膨胀石墨 聚苯胺 复合物 电磁性能 |
| 基金项目: 国家自然科学基金(No.21071125)和浙江省大学学生科技创新计划(No.2014R404056)资助项目 |
| Abstract: Nickel-Zinc Ferrite (NixZn1-xFe2O4), Ni0.7Zn0.3Fe2O4/expanded graphite binary composites (NZF/EG) and its ternary composites coated by Polyaniline (NZF/EG/PANI) were prepared by co-precipitation methods and in situ polymerization, respectively. The composition, structure, morphology and electromagnetic properties of the as-prepared samples were characterized by the modern testing technologies. The results showed that the NZFparticles had been embed into the interlamination of EG, and NZF/EGparticles had been well coated by PANI. The magnetic properties of ternary composites weaken with the decrease of magnetic component, while its electrical conductivities related to the natural characteristic and relative content of EGand PANI. In addition, it presented the excellent electrical and magnetic loss property, and its loss properties were better than those of binary composites. The minimum reflection loss values (corresponding vailable bandwidth) of the ternary composites with ωPANIof 70wt% at thicknesses of 1.5, 2.0 and 2.5 mm reached-19.99 dB (5.82 GHz), -20.33 dB (4.08 GHz) and -25.28 dB (3.67 GHz), respectively, presenting the excellent absorbing effect on electromagnetic wave. |
| Keywords: nickel-zinc ferrite expanded graphite polyaniline composites electromagnetic property |
| 投稿时间：2014-07-10 修订日期：2014-10-15 |
| 摘要点击次数: 1461 |
| 全文下载次数: 2068 |
| 陈瑶瑶,沈俊海,孔卫秋,李良超.镍锌铁氧体/膨胀石墨/聚苯胺复合物的电磁损耗性能[J].无机化学学报,2015,31(2):243-252. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| Support information: |
|
|
|
|
|
|
