Lithium-zinc ferrite-based chitosan/graphene oxide nanocomposite: An efficient microwave absorbing material for C and X bands

IF 6.5 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Communications Pub Date : 2025-03-28 DOI:10.1016/j.coco.2025.102383

Vijay Singh , Rohit , Deepika , Khalid M. Batoo , Mahavir Singh

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Abstract

Nanomaterials and nanocomposites are transforming microwave absorbers despite environmental and cost challenges. Porous lithium zinc ferrite (LZFO) nanoparticles were synthesized via sol-gel autocombustion (calcined at 500 °C), coated with chitosan (CH), and dispersed into graphene oxide (GO) through ultrasonication, forming the CHLZFO-GO nanocomposite. Structural analysis showed increased X-ray density, microstrain, and dislocation density, with decreased average crystallite size and lattice constant. Morphological studies revealed a porous structure with nanoparticles homogeneously distributed within the GO matrix. LZFO exhibited 71 emu/g saturation magnetization and 90.49 Oe coercivity, which decreased when combined with the non-magnetic CH-GO matrix. In the 1–13.5 GHz (GHz) range, CHLZFO-GO showed increased real permeability and complex permittivity while imaginary permeability decreased. Both materials demonstrated predominant dielectric and magnetic losses. CHLZFO-GO exhibited minimal reflection loss (=−71.45 dB (dB)) at 6.78 GHz, while LZFO reached −61.61 dB at 8.21 GHz, highlighting their potential for modern electromagnetic applications.

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锂锌铁氧体基壳聚糖/氧化石墨烯纳米复合材料：一种高效的C和X波段微波吸收材料

纳米材料和纳米复合材料正在改变微波吸收器，尽管环境和成本的挑战。采用溶胶-凝胶自燃烧（500℃煅烧）法制备多孔铁酸锂锌（LZFO）纳米颗粒，包覆壳聚糖（CH），通过超声分散到氧化石墨烯（GO）中，形成了LZFO-GO纳米复合材料。结构分析表明，x射线密度、微应变和位错密度增加，平均晶粒尺寸和晶格常数减小。形态学研究揭示了氧化石墨烯基质中均匀分布的纳米颗粒的多孔结构。LZFO的饱和磁化强度为71 emu/g，矫顽力为90.49 Oe，与非磁性CH-GO基体结合后矫顽力减小。在1 ~ 13.5 GHz （GHz）范围内，CHLZFO-GO的实磁导率和复介电常数增加，虚磁导率降低。两种材料均表现出主要的介电损耗和磁损耗。CHLZFO-GO在6.78 GHz时表现出最小的反射损耗（= - 71.45 dB (dB)），而LZFO在8.21 GHz时达到- 61.61 dB，突出了它们在现代电磁应用中的潜力。

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来源期刊

Composites Communications Materials Science-Ceramics and Composites

CiteScore

12.10

自引率

10.00%

发文量

340

审稿时长

36 days

期刊介绍： Composites Communications (Compos. Commun.) is a peer-reviewed journal publishing short communications and letters on the latest advances in composites science and technology. With a rapid review and publication process, its goal is to disseminate new knowledge promptly within the composites community. The journal welcomes manuscripts presenting creative concepts and new findings in design, state-of-the-art approaches in processing, synthesis, characterization, and mechanics modeling. In addition to traditional fiber-/particulate-reinforced engineering composites, it encourages submissions on composites with exceptional physical, mechanical, and fracture properties, as well as those with unique functions and significant application potential. This includes biomimetic and bio-inspired composites for biomedical applications, functional nano-composites for thermal management and energy applications, and composites designed for extreme service environments.