Ga2O3/C@PPy复合材料的高效微波吸收：吡咯聚合对MIL-96（Ga）衍生Ga2O3/C的作用

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-08-01 DOI:10.1016/j.ceramint.2025.04.300

Minghua Wang , Dan Guo , Bochong Wang , Jianyong Xiang , Kun Zhai , Tianyu Xue , Fusheng Wen , Yingchun Cheng , Congpu Mu

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引用次数: 0

摘要

本文采用微波辅助法制备了MIL-96 (Ga)，并在700℃下热解得到Ga2O3/C （G-700）复合材料。碳化后，Ga2O3纳米颗粒均匀嵌入多孔碳骨架中。MIL-96（Ga）衍生的Ga2O3/C表面作为定向吡咯聚合模板。通过在G-700表面原位聚合吡咯制备了G-700@PPy复合材料。创建了具有调节介电性能的分层界面结构。研究了吡咯掺杂量对G-700@PPy复合材料电磁波吸收性能的影响。实验结果表明，G-700@PPy-3复合材料在1.58 mm薄层下的最小反射损耗（RLmin）值达到−79.0 dB，在1.78 mm薄层下的最大有效吸收带宽（EAB）为5.66 GHz。结果表明，高导电性PPy可显著改善G-700复合材料的阻抗匹配条件和电磁衰减能力，为优化低介电常数复合材料的微波吸收性能提供了重要思路。

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Highly efficient microwave absorption of Ga2O3/C@PPy Composites: The role of pyrrole polymerization on MIL-96(Ga) derived Ga2O3/C

In this work, MIL-96 (Ga) was successfully synthesized by a microwave-assisted method and pyrolyzed at 700 °C to obtain Ga₂O₃/C (G-700) composites. After carbonization, Ga₂O₃ nanoparticles were uniformly embedded in a porous carbon skeleton. The surface of MIL-96(Ga)-derived Ga₂O₃/C was used as a template for directional pyrrole polymerization. G-700@PPy composite materials were obtained by in-situ polymerization of pyrrole on the surface of G-700. A hierarchical interfacial structure was created with regulated dielectric properties. The effect of pyrrole doping content on the electromagnetic waves (EMWs) absorption properties of G-700@PPy composite materials was studied. The experimental result showed that the minimum reflection loss (RL_min) value of G-700@PPy-3 composite materials reached −79.0 dB under a thin thickness of 1.58 mm, and the maximum effective absorption bandwidth (EAB) of 5.66 GHz was obtained under 1.78 mm. The results indicate that highly conductive PPy could significantly improve the impedance matching conditions and electromagnetic attenuation capacity of G-700 composite materials, which provided an important idea for optimizing the microwave absorption properties of low permittivity composites.

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.