| 纳米金属钴/膨胀石墨复合材料的制备、表征及其电磁屏蔽性能 |
| |
| 引用本文： | 邢晓玲,黄玉安,黄润生,唐涛,徐铮,沈俭一.纳米金属钴/膨胀石墨复合材料的制备、表征及其电磁屏蔽性能[J].南京大学学报(自然科学版),2009(5). |
| |
| 作者姓名： | 邢晓玲 黄玉安 黄润生 唐涛 徐铮 沈俭一 |
| |
| 作者单位： | 南京大学化学化工学院;南京大学物理系; |
| |
| 基金项目： | 国家“863”项目(2006AA03Z458);;国家自然科学基金(20673055);;江苏省科技厅高技术项目(BG2006031) |
| |
| 摘 要： | 以醋酸钴为前驱体,乙醇为溶剂,通过浸渍、干燥及H2还原,制备了磁性纳米金属钴颗粒均匀分散在膨胀石墨(EG)纳米层面的复合材料,其中纳米金属钴颗粒呈球形,粒径为300~1 000 nm,主要为金属相,含少量碳化物,属于软磁性材料.在EG纳米层板上铺展的磁性纳米金属钴颗粒有较高的磁导率,因而具有良好的低频电磁屏蔽效应.通过调控铺展在纳米石墨层板上纳米金属钴的含量可以改变复合材料的导电性与导磁性,使得复合材料在较宽的频段内具有良好的电磁屏蔽效能.结果表明,在Co含量为10%~40%时,复合材料的电磁屏蔽效能较好,例如,30%Co-EG在300 kHz到1.5 GHz范围的电磁屏蔽效能可达62~110 dB.
|
| 关 键 词： | 电磁屏蔽 纳米金属钴颗粒 膨胀石墨 |
Preparation,characterization,and electromagnetic shielding effectiveness of the composites of nano-particles of Co dispersed on expanded graphite |
| |
| Xing Xiao-Ling,Huang Yu-An,Huang Run-Sheng,Tang Tao,Xu Zheng,Shen Jian-Yi.Preparation,characterization,and electromagnetic shielding effectiveness of the composites of nano-particles of Co dispersed on expanded graphite[J].Journal of Nanjing University: Nat Sci Ed,2009(5). |
| |
| Authors: | Xing Xiao-Ling Huang Yu-An Huang Run-Sheng Tang Tao Xu Zheng Shen Jian-Yi |
| |
| Institution: | 1.School of Chemistry and Chemical Engineering;Nanjing University;Nanjing;210093;China;2.Department of Physics;China |
| |
| Abstract: | Electromagnetic shielding involves the reflection and/or absorption of electromagnetic radiations by electromagnetic materials.Nowadays,electromagnetic radiations emanate from a wide variety of sources that interfere with electronic devices and affect the health of people.Thus,the radiation shielding at wide frequency range with high effectiveness is increasingly required to meet the high demand of today's society for the reliability of electronics and the health of people.Expanded graphite(EG) has been fou... |
| |
| Keywords: | shielding effectiveness nano-particles of Co expanded graphite |
| 本文献已被 CNKI 等数据库收录！ |
|
