Electromagnetic wave absorption properties of cement-based composites filled with graphene nano-platelets and hollow glass microspheres. (20th February 2018)

• Record Type: Journal Article
• Authors: Lv, Xingjun; Duan, Yuping; Chen, Guoqing
• Is Part Of: Construction & building materials. Volume 162(2018)
• Page Start: 280
• Page End: 285
• Publication Date: 2018-02-20
• Subjects: Cement-based composites -- Graphene nano-platelets -- Hollow glass microspheres -- Microwave absorption; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2017.12.047
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: Absorbing properties of cement composites were improved after doping GN and HGM.​ The composites include GN(0.2%) and HGM (40vol%) have the best absorbing properties. Abstract: The cement-based composites made from graphene nano-platelets (GN) and hollow glass microspheres (HGM) were prepared and its electromagnetic waves absorbing properties were researched in this work. Results show that the absorbing properties were improved after the combination of GN and HGM. As the filling ratio of glass microspheres increases, the value of absorption peak and the bandwidth below −5 dB increases at first and decreases afterwards. In addition, several sharp peaks were obtained and the values tend to appear at high frequency. With further increase of GN, the value at absorbing peak decreases and the curves become relatively flatter. When GN is 0.2%, HGM is 40% (vol/vol) and the thickness is 20 mm, materials have the excellent absorbing properties with the average reflectivity loss being −8.2 dB in the range of 2–18 GHz and the bandwidth was 4.4 GHz below −5 dB. The thickness of sample has a significant influence on the absorbing properties. The optimal thickness is 20–30 mm with 40% (vol/vol) HGM and 0.2% (wt/vol) GN combine together.