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Preparation of SiC/SiO2 Fibers by Microwave Heating
Binbin Dong1, Wenzhe Dong1, Xiaolu Li1
1Henan Key Laboratory of Green Building Materials Manufacturing and Intelligent Equipment, Luoyang Institute of Science and Technology, Luoyang, Henan 471023, China.
ACS Omega
|March 30, 2026
Summary
This study introduces a low-temperature microwave synthesis for SiC/SiO2 fibers, overcoming industrial production challenges. The resulting fibers show excellent electromagnetic wave absorption, ideal for lightweight, efficient absorbers.
Area of Science:
- Materials Science
- Nanotechnology
- Ceramics Engineering
Background:
- Industrial production of high-performance SiC/SiO2 fibers is limited by high energy consumption and complex processes.
- Development of efficient and cost-effective synthesis methods is crucial for advanced materials applications.
Purpose of the Study:
- To develop a direct, low-temperature synthesis route for SiC/SiO2 fibers using microwave heating.
- To investigate the synthesis mechanism and electromagnetic wave absorption properties of the synthesized fibers.
Main Methods:
- Direct synthesis of SiC/SiO2 fibers using pure-material microwave heating at 700-1100 °C.
- Systematic investigation of phase composition, microstructure, and microwave-assisted synthesis process.
- Analysis of electromagnetic wave absorption performance, including minimum reflection loss (RLmin) and thickness.
Main Results:
- A two-stage growth mechanism (kinetically controlled SiC fiber growth and thermodynamically driven SiO2 bead formation) was proposed.
- SiC/SiO2 fibers synthesized at 1000 °C demonstrated exceptional electromagnetic wave absorption.
- Achieved a minimum reflection loss (RLmin) of -42.49 dB at an ultrathin thickness of 2.9 mm.
Conclusions:
- The developed microwave-assisted synthesis offers a low-temperature, efficient route for SiC/SiO2 fibers.
- The synthesized SiC/SiO2 fibers exhibit excellent lightweight, high-efficiency microwave absorbing properties.
- These findings highlight the potential of these materials for advanced electromagnetic wave absorption applications.
