Ibrahim Idza Riati, Matori Khamirul Amin, Ismail Ismayadi, Awang Zaiki, Rusly Siti Nor Ain, Nazlan Rodziah, Mohd Idris Fadzidah, Muhammad Zulkimi Muhammad Misbah, Abdullah Nor Hapishah, Mustaffa Muhammad Syazwan, Shafiee Farah Nabilah, Ertugrul Mehmet
Materials Synthesis and Characterization Laboratory, Institute of Advanced Technology, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.
Department of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.
Sci Rep. 2020 Feb 21;10(1):3135. doi: 10.1038/s41598-020-60107-1.
Microwave absorption properties were systematically studied for double-layer carbon black/epoxy resin (CB) and NiZnFeO/epoxy resin (F) nanocomposites in the frequency range of 8 to 18 GHz. The NiZnFeO nanoparticles were synthesized via high energy ball milling with subsequent sintering while carbon black was commercially purchased. The materials were later incorporated into epoxy resin to fabricate double-layer composite structures with total thicknesses of 2 and 3 mm. The CB1/F1, in which carbon black as matching and ferrite as absorbing layer with each thickness of 1 mm, showed the highest microwave absorption of more than 99.9%, with minimum reflection loss of -33.8 dB but with an absorption bandwidth of only 2.7 GHz. Double layer absorbers with F1/CB1(ferrite as matching and carbon black as absorbing layer with each thickness of 1 mm) structure showed the best microwave absorption performance in which more than 99% microwave energy were absorbed, with promising minimum reflection loss of -24.0 dB, along with a wider bandwidth of 4.8 GHz and yet with a reduced thickness of only 2 mm.
系统研究了双层炭黑/环氧树脂（CB）和镍锌铁氧体/环氧树脂（F）纳米复合材料在8至18 GHz频率范围内的微波吸收特性。镍锌铁氧体纳米颗粒通过高能球磨并随后烧结合成，而炭黑则从商业渠道购买。随后将这些材料掺入环氧树脂中，以制造总厚度为2和3 mm的双层复合结构。CB1/F1结构（其中炭黑作为匹配层，铁氧体作为吸收层，各层厚度均为1 mm）显示出最高的微波吸收率，超过99.9%，最小反射损耗为-33.8 dB，但吸收带宽仅为2.7 GHz。具有F1/CB1结构（铁氧体作为匹配层，炭黑作为吸收层，各层厚度均为1 mm）的双层吸收体表现出最佳的微波吸收性能，其中超过99%的微波能量被吸收，最小反射损耗有望达到-24.0 dB，带宽更宽，为4.8 GHz，且厚度仅减小到2 mm。
