High-Temperature, Lightweight Ceramics with Nano-Sized Ferrites for EMI Shielding: Synthesis, Characterisation, and Potential Applications

Materials 2023
Vitālijs Abramovskis, Ilmārs Zālīte, Mikhail Maiorov, Jānis Baroniņš, Ashish Kumar Singh, Vjačeslavs Lapkovskis, Saurav Goel, Andrejs Šiškins

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 CoFe2O4 nanoparticles. This research explores compositions with varying CoFe2O4 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 ma-terial. By increasing the concentration of ferrite nanoparticles, the electromagnetic shielding effect of the material (saturation magnetisation (Ms) and remanent magnetisation (Mr)) 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.

Atslēgas vārdi
cenospheres; CoFe2O4; high-temperature sintering; magnetic properties; syntactic foam
DOI
10.3390/ma16247615
Hipersaite
https://www.mdpi.com/1996-1944/16/24/7615

Abramovskis, V., Zālīte, I., Maiorov, M., Baroniņš, J., Singh, A., Lapkovskis, V., Goel, S., Šiškins, A. High-Temperature, Lightweight Ceramics with Nano-Sized Ferrites for EMI Shielding: Synthesis, Characterisation, and Potential Applications. Materials, 2023, Vol. 16, No. 24, Article number 7615. ISSN 1996-1944. Pieejams: doi:10.3390/ma16247615

Publikācijas valoda
English (en)