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Electromagnetic Field Shielding Using Interior Paints Enhanced with Metal Powders.
1Department of Electric Power Engineering, Faculty of Electrical Engineering and Informatics, Technical University of Košice, Letná 1/9, 042 00 Košice-Sever, Slovakia.
Materials (Basel, Switzerland)
|August 28, 2025
Summary
Researchers developed novel protective coatings using recycled metal powders and interior paint to block electromagnetic radiation. The best formulations significantly reduced radiation across a wide frequency range.
Area of Science:
- Materials Science
- Electromagnetics
- Environmental Science
Background:
- Electromagnetic radiation (EMR) poses environmental and health concerns.
- Effective shielding solutions are crucial for various applications.
- Developing cost-effective and sustainable shielding materials is an ongoing challenge.
Purpose of the Study:
- To investigate the electromagnetic shielding effectiveness of protective coatings.
- To evaluate coatings made from commercial and recycled metal powders mixed with interior paint.
- To determine optimal compositions for radiation elimination.
Main Methods:
- Prepared coatings using aluminum oxide, manganese dioxide, graphite, iron, and zinc oxide powders.
- Incorporated powders (particle size <10 μm and <50 μm) into interior paint at various ratios.
- Measured shielding effectiveness, absorption, and reflection in the 0.9-9 GHz frequency range.
Main Results:
- Evaluated shielding performance based on absorption and reflection properties.
- Identified specific powder mixtures that yielded superior shielding.
- Achieved shielding values ranging from 0.38 to 6.2 dB in the tested frequency range.
Conclusions:
- Protective coatings incorporating recycled metal powders show promise for electromagnetic radiation shielding.
- The composition of the coating significantly impacts its shielding effectiveness.
- Further research can optimize these sustainable coatings for practical applications.
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