Development of high performance microwave absorption modified epoxy coatings based on nano-ferrites

Area of Science:

• Materials Science
• Nanotechnology
• Electromagnetics

Background:

• Increasing electromagnetic energy from wireless technologies poses health risks.
• High-efficiency electromagnetic wave (EMW) absorption coatings are crucial for mitigating these effects.

Purpose of the Study:

• To synthesize and characterize nano-CuFe2O4 and nano-CaFe2O4.
• To develop and evaluate microwave absorber coatings using these nanoparticles in an epoxy resin matrix.

Main Methods:

• Sol-gel synthesis of nano-CuFe2O4 and nano-CaFe2O4.
• Characterization of structural, electrical, dielectric, and magnetic properties.
• Incorporation of nanoparticles into epoxy resin to create microwave coatings.

Main Results:

• Synthesized nanoparticles exhibited suitable electrical, dielectric, and magnetic properties for high-frequency applications.
• AC conductivity increased at higher frequencies, and low coercivity was observed.
• Microwave absorption coatings demonstrated significant absorption bands, with minimum return loss values of -13 dB and -16 dB.
• The CuFe2O4-based coating showed better absorption than the CaFe2O4-based coating.

Conclusions:

• Nano-CuFe2O4 and nano-CaFe2O4 are viable materials for developing effective microwave absorber coatings.
• The developed coatings show potential for protecting human health from harmful electromagnetic wave radiation.