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ZnO/泡沫炭复合材料的制备及其电磁屏蔽性能
Fabrication of ZnO/Carbon Foam Composites and their Electromagnetic Shielding Properties
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- DOI:
- 作者:
- 邵毅伟，刘和光
SHAO Yiwei, LIU Heguang
- 作者单位:
- 西安理工大学 材料科学与工程学院，陕西 西安 710048
School of Materials Science and Engineering, Xi'an University of Technology, Xi'an 710048, China
- 关键词:
- 电磁屏蔽；ZnO 纳米颗粒；泡沫炭；复合材料
electromagnetic shielding; ZnO nanoparticles; carbon foam; composite
- 摘要:
- 为进一步提高泡沫炭材料的电磁屏蔽性能，本文以泡沫炭为基体，以 ZnO 纳米颗粒为增强体，构建了 ZnO/
泡沫炭复合材料，研究了 ZnO 纳米颗粒的引入对泡沫炭电磁屏蔽性能的影响。 实验结果表明，ZnO/ 泡沫炭复合材料在
X 波段内的总电磁屏蔽效能可达 24 dB, 明显优于泡沫炭材料。 这主要归因于引入的 ZnO 纳米颗粒增强了泡沫炭材料
的介电损耗。 此外，研究了复合材料的衰减常数和趋肤深度，发现与泡沫炭材料相比，复合材料的衰减常数得到显著提
升，趋肤深度明显降低。
To improve the electromagnetic shielding performance of pristine carbon foam, a ZnO/carbon foam composite was constructed using ZnO nanoparticles as reinforcement in this paper. The influence of the introduced ZnO nanoparticles on the electromagnetic shielding performance was comprehensively studied. The results indicate that the total shielding effectiveness of the ZnO/carbon foam composite can reach 24 dB, which is obviously higher than that of the pristine carbon foam. This is attributed to the addition of ZnO nanoparticles, which enhance the dielectric loss of the pristine carbon foam. Moreover, the attenuation constant and the skin depth of the composite are also investigated. It is found that the composite delivers a higher attenuation constant and a lower skin depth.