Three-Dimensional Flower Multiphase Interface Cu₃BiS₃/CuS/Bi₂S₃ for Efficient Electromagnetic Wave Absorption

Area of Science:

• Materials Science
• Nanotechnology
• Electromagnetics

Background:

• Metal sulfide composites are promising for electromagnetic wave (EMW) absorption due to tunable structures and dielectric properties.
• Developing efficient EMW absorbers is crucial for various technological applications.

Purpose of the Study:

• To synthesize and characterize novel Cu3BiS3/CuS/Bi2S3 (CSB) composites for EMW absorption.
• To investigate the effect of composite structure and composition on EMW absorption performance.

Main Methods:

• A two-step microwave method was employed for the synthesis of 3D flower-like CSB composites.
• The composites were characterized to analyze their structural, morphological, and electromagnetic properties.

Main Results:

• The CSB2 composite achieved an optimal reflection loss of -66 dB at 11 GHz (2.19 mm thickness).
• An optimal effective absorption bandwidth of 3.9 GHz (14.1-18 GHz) was observed at 1.5 mm thickness.
• The 3D flower-like structure and heterogeneous interfaces enhanced interfacial polarization and EMW absorption.

Conclusions:

• The synthesized CSB composites demonstrate excellent EMW absorption capabilities.
• The study provides a significant reference for applying metal-based sulfides in EMW absorption technologies.