Electromagnetic interference shielding effectiveness of a flexible carbon fiber felt containing in situ grown hafnium carbide nanowires and nanobelts. Issue 15 (15th October 2019)

• Record Type: Journal Article
• Authors: Tian, Song; Zhou, Lu; Liang, Zhongtian; Wang, Yanru; Yang, Yu; Qiang, Xinfa; Qian, Zhonghao
• Is Part Of: Ceramics international. Volume 45:Issue 15(2019)
• Page Start: 19513
• Page End: 19516
• Publication Date: 2019-10-15
• Subjects: Hafnium carbide -- Chemical vapor deposition -- Electromagnetic interference shielding effectiveness; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2019.06.039
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Hafnium carbide nanowires (HfCnw ) and a small amount of hafnium carbide nanobelts (HfCnb ) were incorporated in a flexible carbon fiber felt by catalysis-assisted chemical vapor deposition to fabricate an electromagnetic interference (EMI) shielding carbon-based material with excellent electromagnetic wave absorption properties. The EMI shielding effectiveness (SE) of the flexible carbon fiber felt containing in situ grown HfCnw and HfCnb was investigated in X band (8.2 GHz–12.4 GHz). The result shows that more than 99% of the incident beam was shielded when the thickness of the sample is 1.5 mm. Moreover, all the SEA /SET values in this work are more than 0.8, even up to 0.94 at 11 GHz, meaning SET mainly results from SEA . The excellent electromagnetic wave absorption properties of the sample are due to the conductivity loss triggered by moving electrons and the polarization loss caused by considerable interfaces.