40Sm0.5Sr0.5Co1-xMnxO3-60SrZrO3复合材料的微波吸收性能及机理

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

Ceramics International Pub Date : 2025-09-01 DOI:10.1016/j.ceramint.2025.06.195

Tiehao Zhang , Wenting He , Yuyi Gao , Qian Guo , Yue Ma , Hongbo Guo

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引用次数: 0

摘要

开发具有薄厚度、宽带宽和优异热稳定性的微波吸收材料仍然是实际工程应用的关键挑战。本文系统地研究了40 wt%Sm0.5Sr0.5CO1-xMnxO3-60 wt%SrZrO3复合材料的介电和微波吸收特性。值得注意的是，Sm0.5Sr0.5CO0.5Mn0.5O3-SrZrO3复合材料的最宽带宽为5.1 GHz，反射损耗为<；−5 dB，厚度仅为1.4 mm，这归功于最佳的输入阻抗和优越的衰减系数。通过对电磁耗散机制的综合分析，发现Mn4+取代Co3+导致导电损耗降低，偶极子极化和界面极化增强，同时涡流损耗和磁共振也有贡献。这些发现确立了Sm0.5Sr0.5Co1-xMnxO3-SrZrO3 （x = 0.5）复合材料作为微波吸收应用的有前途的候选材料，提供了薄轮廓设计和宽带性能的最佳组合。

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The microwave absorption properties and mechanism of 40Sm0.5Sr0.5Co1-xMnxO3-60SrZrO3 composites

Development of microwave absorption materials (MAMs) featuring thin thickness, wide bandwidth, and superior thermal stability remains a critical challenge for practical engineering applications. This paper systematically investigated the dielectric and microwave absorption characteristics of 40 wt%Sm_0.5Sr_0.5C_O1-xMn_xO₃-60 wt%SrZrO₃ composites. Remarkably, the Sm_0.5Sr_0.5C_O0.5Mn_0.5O₃-SrZrO₃ composite presents the widest bandwidth of 5.1 GHz with reflection loss < −5 dB at a thickness of only 1.4 mm, attributed to the optimal input impedance and a superior attenuation factor. Through comprehensive analysis of electromagnetic dissipation mechanisms, it revealed that the Mn⁴⁺ substitution of Co³⁺ leads to a reduction in conduction loss and an enhancement of both dipole polarization and interfacial polarization, while the eddy-current loss and magnetic resonances have contribution as well. These findings establish the Sm_0.5Sr_0.5Co_1-xMn_xO₃-SrZrO₃ (x = 0.5) composite as a promising candidate for microwave absorption applications, offering an optimal combination of thin-profile design and broadband performance.

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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.