Breakthrough in Microwave Absorption Technology

Strategic Insights -

Researchers at the Motilal Nehru National Institute of Technology Allahabad in Prayagraj, India, have made significant strides in developing a lightweight and thin microwave absorber that showcases exceptional performance in electromagnetic interference (EMI) shielding and stealth technologies. The innovative composite material, comprised of nickel-dispersed boron carbide, has been designed to address the challenge of achieving effective microwave absorption with minimal thickness. This research has the potential to revolutionize the field of ceramics and technology.

Key Takeaways:

  • The research team, led by Abhishek Kumar, has developed a nickel-dispersed boron carbide composite using a ball milling technique, which is a more efficient and cost-effective method.
  • The composite material was thoroughly evaluated using various techniques, including X-ray diffraction, scanning electron microscopy, and energy-dispersive spectroscopy, demonstrating exceptional performance in microwave absorption.
  • The suggested double-layer design significantly reduces material consumption and total weight while providing enhanced absorption capabilities, making it suitable for advanced EMI shielding and stealth applications.
  • The minimum reflection loss achieved by the composite material was -66.78 dB at a thickness of 2.1 mm, exceeding the expectations of the research team.
  • The study utilized the Genetic Algorithm to optimize the design of the composite material, resulting in improved performance and efficiency.
  • Additional authors of the research include Deeksha Gupta and Ashish Dubey, who contributed to the development and characterization of the composite material.
  • The findings of this research have significant implications for the development of advanced EMI shielding and stealth technologies.

Statistics:

  • The composite material achieved a minimum reflection loss of -66.78 dB at a thickness of 2.1 mm.
  • The suggested double-layer design reduces material consumption and total weight while providing enhanced absorption capabilities.
  • The study was conducted within the 2-18 GHz frequency spectrum.
  • Energy-dispersive spectroscopy was used to analyze the elemental composition of the composite material.
  • The vector network analyzer was utilized to assess the dielectric characteristics of the composite material.
  • The research has been peer-reviewed and published in the journal Ceramics International, Volume 51, Issue 19, pp. 27475-27484.

Sources:

  • NewsRx. Studies from Motilal Nehru National Institute of Technology Allahabad Add New Findings in the Area of Ceramics Research (Improving Microwave Absorption Bandwidth of Nickel-dispersed Boron Carbide By Double-layering Using Genetic Algorithm). Mathematics Week. August 26, 2025; p 4339.
  • Improving Microwave Absorption Bandwidth of Nickel-dispersed Boron Carbide By Double-layering Using Genetic Algorithm. Ceramics International, 2025;51(19):27475-27484.