| Autor: |
Abramovskis V; Laboratory of Ecological Solutions and Sustainable Development of Materials, Institute of General Chemical Engineering, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Pulka 3, K-3, LV-1007 Riga, Latvia., Zalite I; Institute of Materials and Surface Technologies, Riga Technical University, P. Valdena Iela 7, LV-1048 Riga, Latvia., Maiorov M; Institute of Physics, University of Latvia, Miera Iela 32, LV-2169 Salaspils, Latvia., Baronins J; Laboratory of Ecological Solutions and Sustainable Development of Materials, Institute of General Chemical Engineering, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Pulka 3, K-3, LV-1007 Riga, Latvia., Singh AK; SMW Group AS, Kr. Barona Street 3-1, LV-1050 Riga, Latvia., Lapkovskis V; Laboratory of Ecological Solutions and Sustainable Development of Materials, Institute of General Chemical Engineering, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Pulka 3, K-3, LV-1007 Riga, Latvia., Goel S; School of Engineering, London South Bank University, London SE1 0AA, UK.; Department of Mechanical Engineering, University of Petroleum and Energy Studies, Dehradun 248007, India., Shishkin A; Laboratory of Ecological Solutions and Sustainable Development of Materials, Institute of General Chemical Engineering, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Pulka 3, K-3, LV-1007 Riga, Latvia. |
| Abstrakt: |
The present study focuses on the synthesis and characterisation of a lightweight ceramic material with electromagnetic interference (EMI) shielding properties, achieved using mullite containing micrometre-sized hollow spheres (cenospheres) and CoFe 2 O 4 nanoparticles. This research explores compositions with varying CoFe 2 O 4 contents ranging from 0 up to 20 wt.%. Conventional sintering in an air atmosphere is carried out at a temperature between 1100 and 1300 °C. The addition of ferrite nanoparticles was found to enhance the process of sintering cenospheres, resulting in improved material density and mechanical properties. Furthermore, this study reveals a direct correlation between the concentration of ferrite nanoparticles and the electromagnetic properties of the material. By increasing the concentration of ferrite nanoparticles, the electromagnetic shielding effect of the material (saturation magnetisation ( M s ) and remanent magnetisation ( M r )) was observed to strengthen. These findings provide valuable insights into designing and developing lightweight ceramic materials with enhanced electromagnetic shielding capabilities. The synthesized ceramic material holds promise for various applications that require effective electromagnetic shielding, such as in the electronics, telecommunications, and aerospace industries. |
