Electromagnetic and microwave absorbing properties of hollow carbon nanospheres

Bulletin of materials science

Tianchun Zou³  Naiqin Zhao¹  Chunsheng Shi¹  Haipeng Li² 

[1] School of Materials Science and Engineering, Tianjin University, Tianjin 300 072, China$$School of Materials Science and Engineering, Tianjin University, Tianjin 300 072, ChinaSchool of Materials Science and Engineering, Tianjin University, Tianjin 300 072, China$$;School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300 130, China$$School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300 130, ChinaSchool of Materials Science and Engineering, Hebei University of Technology, Tianjin 300 130, China$$;Airworthiness Certification Technology Research and Management Centre, Civil Aviation University of China, Tianjin 300 300, China$$Airworthiness Certification Technology Research and Management Centre, Civil Aviation University of China, Tianjin 300 300, ChinaAirworthiness Certification Technology Research and Management Centre, Civil Aviation University of China, Tianjin 300 300, China$$

关键词: Nanomaterials;    nanospheres;    CVD;    electric;    magnetic;    microwave absorption properties.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

A mass of hollow carbon nanospheres (HCNSs) was fabricated by chemical vapour deposition of methane over Ni/Al₂O₃ catalyst at 600 °C. The products were characterized with high-resolution transmission electron microscope images, and the results showed that the external diameter of the HCNSs was 5â€�??90nm and the thickness of wall was about 10 nm. Microwave absorption of HCNSs/paraffin composites was mainly attributed to dielectric loss. The microwave-absorbing peaks of composites containing HCNSs shifts to low frequencies, and the bandwidth below âˆ�?10 dB and minimum RL decrease with increasing thickness of HCNSs/paraffin composites.

【 授权许可】

Unknown