Multilayer Carbon-Structured BaTiO₃@C Nanocomposites with Wide Microwave Absorption Bandwidth and Excellent Corrosion...

Area of Science:

• Materials Science
• Nanotechnology
• Electromagnetics

Background:

• Developing lightweight materials with both electromagnetic wave absorption and corrosion resistance is critical for marine stealth.
• Integrating electromagnetic attenuation, impedance matching, and corrosion protection presents a significant challenge.

Purpose of the Study:

• To fabricate a multilayer carbon-structured BaTiO3@C nanocomposite (CSTB-x) for enhanced marine stealth applications.
• To investigate the material's electromagnetic wave absorption and corrosion resistance properties.

Main Methods:

• Fabrication of CSTB-x via freeze-drying and in situ pyrolysis.
• Characterization of the BaTiO3@C heterostructure within a nitrogen-doped multilayer porous carbon framework.
• Evaluation of electromagnetic wave absorption, corrosion resistance, and radar cross-section.

Main Results:

• CSTB-1.0 achieved a minimum reflection loss of -48.07 dB and a maximum effective absorption bandwidth of 7.04 GHz.
• The material demonstrated excellent corrosion protection with a low current density (8.93 × 10^-6 A/cm^2) and high polarization resistance (7.87 × 10^3 Ω∙cm^2).
• A minimum radar cross-section of -41.25 dBsm was recorded, indicating significant electromagnetic scattering suppression.

Conclusions:

• The BaTiO3@C nanocomposite offers a feasible strategy for designing marine stealth materials with integrated microwave absorption and corrosion resistance.
• The multilayer carbon framework and porous core-shell structure contribute to enhanced corrosion resistance.
• Optimized impedance matching and synergistic loss mechanisms are key to the material's electromagnetic absorption capabilities.