Reduced Graphene Oxide/Barium Ferrite Ceramic Nanocomposite Synergism for High EMI Wave Absorption

Area of Science:

• Materials Science
• Nanotechnology
• Electromagnetics

Background:

• Electromagnetic interference (EMI) shielding is crucial for electronic devices.
• Developing lightweight, high-performance shielding materials remains a challenge.
• Synergistic effects in nanocomposites can enhance electromagnetic wave absorption.

Purpose of the Study:

• To develop and evaluate a novel nanocomposite for enhanced electromagnetic shielding.
• To investigate the synergistic effects of TCRGO and magnetic materials (BF, MAG).
• To optimize shielding performance based on material composition and thickness.

Main Methods:

• Fabrication of binary ceramic nanocomposite sheets using dry powder compaction.
• Incorporation of varying weight percentages of TCRGO with barium hexaferrite (BF) and magnetite (MAG).
• Evaluation of shielding performance using a vector network analyzer in the X-band.

Main Results:

• The 25 wt % TCRGO/BF nanocomposite demonstrated superior shielding efficiency (SET) of 52 dB and absorption shielding efficiency (SEA) of 41 dB.
• BF-based nanocomposites showed 130% higher SET compared to MAG-based ones.
• A 5 mm thick TCRGO/BF sample achieved an SET of 99 dB and SEA of 91 dB at 1000 mW incident power.

Conclusions:

• The developed TCRGO/BF nanocomposite exhibits excellent and stable electromagnetic shielding performance.
• The synergistic interaction between TCRGO and BF significantly enhances impedance matching and absorption.
• This material holds promise for effective EMI shielding applications.