Investigating Enhanced Microwave Absorption of CNTs@Nd0.15-BaM/PE Plate via Low-Temperature Sintering and High-Energy Ball Milling

Author:

Wang Chengying123,Feng Xiaohua23ORCID,Yu Chengwu4,Zhang Lixia1,Zhou Shengguo1,Liu Yi23,Huang Jing23,Li Hua23ORCID

Affiliation:

1. School of Materials Science and Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China

2. Zhejiang-Japan Joint Laboratory for Antibacterial and Antifouling Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China

3. Zhejiang Engineering Research Center for Biomedical Materials, Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China

4. Beijing Institute of Control Engineering, Beijing 100190, China

Abstract

Composite plates comprising a blend of rare earth neodymium-(Nd) doped M-type barium ferrite (BaM) with CNTs (carbon nanotubes) and polyethylene WERE synthesized through a self-propagating reaction and hot-pressing treatment. The plates’ microscopic characteristics were analyzed utilizing X-ray diffraction (XRD), Fourier transform infrared spectrophotometry (FTIR), thermo–gravimetric analysis (TGA), Raman, and scanning electron microscopy (SEM) analytical techniques. Their microwave absorption performance within the frequency range of 8.2 to 18 GHz was assessed using a vector network analyzer. It showed that CNTs formed a conductive network on the surface of the Nd-BaM absorber, significantly enhancing absorption performance and widening the absorption bandwidth. Furthermore, dielectric polarization relaxation was investigated using the Debye theory, analyzing the Cole–Cole semicircle. It was observed that the sample exhibiting the best absorbing performance displayed the most semicircles, indicating that the dielectric polarization relaxation phenomenon can increase the dielectric relaxation loss of the sample. These findings provide valuable data support for the lightweight preparation of BaM-based absorbing materials.

Funder

National Natural Science Foundation of China

S&T Innovation 2025 Major Special Program of Ningbo

Youth Innovation Promotion Association of the Chinese Academy of Sciences, China

14th Five-Year Civil Space Pre-Research Project, China

Key Research and Development Program of Ningbo, China

Publisher

MDPI AG

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