Tunable electromagnetic-wave absorption properties of MRP/honeycomb structure composites

• Published in: Journal of alloys and compounds 2024-12, Vol.1009, p.176714, Article 176714
• Main Authors: Yin, Zhiyang, Wu, Wenchun, Li, Yaping, Bai, Longyu, Li, Yuyan, Qi, Song, Fu, Jie, Yu, Miao
• Format: Article
• Language: English
• Subjects: Carbonyl iron particles; Electromagnetic absorption; Honeycomb structure; Magnetic tuning; Magnetorheological plastomer
• ISSN: 0925-8388
• DOI: 10.1016/j.jallcom.2024.176714

Recent advancements in tunable electromagnetic wave-absorbing metamaterials have garnered considerable interest in the scientific community, particularly concerning the development of metamaterials with adjustable electromagnetic properties. This study introduces a novel magnetic-controlled tunable electromagnetic metamaterial, employing Magnetorheological Plastomers (MRPs) within a honeycomb structure. MRP demonstrate exceptional electromagnetic wave absorption and magnetic induction capabilities, rendering them ideal for developing magnetically controlled tunable metamaterials. The principal mechanism is predicated upon the adjustable electromagnetic properties via the dynamic realignment of carbonyl iron particles (CIPs) within the MRP matrix under the influence of an external magnetic field. By adjusting the CIP chain angle, effectively keeping the reflection loss below −10 dB within the 4–5.6 GHz range and 13.84–18 GHz range, reaching a minimum of −28.8 dB. In addition, the good wave absorbing effect can still be maintained two weeks after the initial tuning. These results not only corroborate the enhanced performance of MRPs as tunable electromagnetic wave-absorbing metamaterials but also underscore their potential in expanding the applicability across diverse electromagnetic applications. ●This study prepared a magnetorheological plastomer using carbonyl iron powder and silicone rubber, filled into an optimized 3D-printed honeycomb structure.●A 200 mT magnetic field and 60° particle chain angle in the MRP increased the absorption bandwidth from 4.72 to 5.76 GHz and improved reflection loss from -19.51 to -28.8 dB. Absorption performance remained stable for two weeks.●COMSOL simulations verified that a 60° chain angle in the MRP enhanced coupling with the honeycomb structure, improving absorption.