研究ε负竹/NiS2/(MnFe2O4)x/PVC 元复合材料的结构、磁性和电气性能

IF 23.2 2区 材料科学 Q1 MATERIALS SCIENCE, COMPOSITES Advanced Composites and Hybrid Materials Pub Date : 2024-11-11 DOI:10.1007/s42114-024-01012-3
Sakineh Karimi, Reza Gholipur
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引用次数: 0

摘要

具有可调电磁特性的轻质、宽光谱和高反射损耗 (RL) 元复合材料的独特和意想不到的特性一直备受关注。本研究项目旨在研究竹/NiS2/(MnFe2O4)x/PVC 元复合材料的结构、磁性和电学属性。当 MnFe2O4 的摩尔值为 0.0027 或更低时,在 0-100 MHz 或更高频率下检测到负介电常数的存在。主要原因是经过加工的竹子结构很容易产生电渗流,这对于实现负介电常数和高交流电导率至关重要。随频率变化的介电常数与洛伦兹模型一致。通过改变 MnFe2O4 的摩尔分数来调整阻抗,元复合材料的电磁吸收能力在厚度为 1 毫米时提高到 - 25.87878 dB。本研究的发现有望为负介电常数元复合材料领域的创新发展铺平道路,促进ε负材料和轻质吸收特性在忆阻器、光敏电阻(LDR)和低频反射器等电磁设备中的实际应用。
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Investigation of the structural, magnetic, and electrical properties of epsilon-negative Bamboo/NiS2/(MnFe2O4)x/PVC metacomposites

Considerable attention has been focused on the unique and unexpected properties of lightweight, broad-spectrum, and high reflection loss (RL) metacomposites with adjustable electromagnetic characteristics. This research project aimed to investigate the structural, magnetic, and electrical attributes of Bamboo/NiS2/(MnFe2O4)x/PVC metacomposites, which display negative permittivity behavior as a novel material. When the mole value of MnFe2O4 was 0.0027 or lower, the presence of negative permittivity was detected at frequencies between 0–100 MHz and higher. The main reason for this was the easy creation of electrical percolation through the processed bamboo structure, which is crucial for achieving negative permittivity and high AC conductivity. The frequency-dependent variations in permittivity were in agreement with the Lorentz model. By altering the mole fraction of MnFe2O4 to adjust impedance, the electromagnetic absorption capabilities of the metacomposites were improved to − 25.87878 dB for a thickness of 1 mm. The findings presented in this study have the potential to pave the way for innovative developments in the field of negative permittivity metacomposites, facilitating the practical implementation of epsilon-negative materials and lightweight absorption properties in electromagnetic devices such as memristors, light-dependent resistors (LDRs), and low-frequency reflectors.

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来源期刊
CiteScore
26.00
自引率
21.40%
发文量
185
期刊介绍: Advanced Composites and Hybrid Materials is a leading international journal that promotes interdisciplinary collaboration among materials scientists, engineers, chemists, biologists, and physicists working on composites, including nanocomposites. Our aim is to facilitate rapid scientific communication in this field. The journal publishes high-quality research on various aspects of composite materials, including materials design, surface and interface science/engineering, manufacturing, structure control, property design, device fabrication, and other applications. We also welcome simulation and modeling studies that are relevant to composites. Additionally, papers focusing on the relationship between fillers and the matrix are of particular interest. Our scope includes polymer, metal, and ceramic matrices, with a special emphasis on reviews and meta-analyses related to materials selection. We cover a wide range of topics, including transport properties, strategies for controlling interfaces and composition distribution, bottom-up assembly of nanocomposites, highly porous and high-density composites, electronic structure design, materials synergisms, and thermoelectric materials. Advanced Composites and Hybrid Materials follows a rigorous single-blind peer-review process to ensure the quality and integrity of the published work.
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