Preparation and electromagnetic shielding effectiveness of cobalt ferrite nanoparticles/carbon nanotubes composites. (18th March 2019)

• Record Type: Journal Article
• Authors: Wang, Min; Zhang, Yanlin; Dong, Chengjun; Chen, Gang; Guan, Hongtao
• Is Part Of: Nanomaterials and nanotechnology. Volume: 9(2019)
• Publication Date: 2019-03-18
• Subjects: Electromagnetic shielding -- cobalt ferrite nanoparticles -- carbon nanotube composites; Nanostructured materials -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials; Nanotechnology; Periodicals; 620.5
• DOI: 10.1177/1847980419837821
• Languages: English
• ISSNs: 1847-9804

Abstract

Here, the cobalt ferrite/carbon nanotubes nanocomposites were directly synthesized by a facile hydrothermal method at 200°C using benzyl alcohol as the solvent. The crystal and morphological structures as well as electromagnetic shielding performance at Ku band (12–18 GHz) were thoroughly investigated. Cobalt ferrite nanoparticles with a diameter around 6–10 nm were anchored on the surface of carbon nanotubes with some aggregation. It is found that the as-prepared nanocomposites exhibit excellent electromagnetic shielding performance with values 22–25 dB in the Ku frequency range with a thickness of 2 mm. The small cobalt ferrite nanoparticles offer a large number of polarization and magnetization active sites to improve the electromagnetic performance by the incorporation of carbon nanotubes.