Exploring the structural and optical modifications induced by Ru doping in Ba0.5Sr0.5RuxFe12-xO19 M-type hexaferrites to enhanced microwave absorption

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-05-01 DOI:10.1016/j.ceramint.2025.01.480

Varsha C. Pujari , Pramod D. Mhase , Sunil M. Patange , Shoyebmohamad F. Shaikh , Vijaykumar V. Jadhav , Santosh S. Jadhav

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引用次数: 0

Abstract

This study reports the effects of Ru doping on the structure, optical and microwave absorption (MWA) properties of M-type hexaferrites (MHF) for potential applications in electromagnetic interference (EMI) shielding and stealth technology. The Ba_0.5Sr_0.5Ru_xFe_12-xO₁₉ (x = 0.00,0.05,0.10,0.15 and 0.20) materials were synthesized using a sol–gel auto-combustion method, and their structural and morphological characteristics were analyzed using XRD, FESEM, and EDAX. The Rietveld refining method confirmed the stability of a hexaferrite structure belonging to the P6₃/mmc space group. The FESEM analysis of prepared hexaferrite materials revealed well-organized structures with particle sizes ranging from 0.63 μm to 5.12 μm. EDAX confirmed the presence of Ba, Sr, Ru, Fe, and O, indicating the purity of the synthesized MHF. PL spectroscopy showed that increasing the doping of Ru decreased PL intensity due to non-radiative recombination. Ru³⁺ doping gives rise to a prominent emission peak at 578 nm, an increase in the band gap energy from 2.58 eV to 2.83 eV and improved microwave absorption properties, with a minimum reflection loss (RL) of −34.4 dB at 10.08 GHz for x = 0.15. The work demonstrates the synergistic role of Ru³⁺ substitution in enhancing dielectric properties, magnetic loss mechanisms, and impedance matching, making these materials ideal candidates for tailored electromagnetic wave absorption in the 8–12 GHz frequency range. The material thickness plays a crucial role, with thinner samples exhibiting better microwave absorption at higher frequencies and thicker samples performing more effectively at lower frequencies, making prepared MHFs suitable for electromagnetic interference (EMI) shielding.

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探索Ru掺杂Ba0.5Sr0.5RuxFe12-xO19 m型六铁氧体对微波吸收增强的结构和光学修饰

本研究报道了Ru掺杂对m型六铁氧体（MHF）结构、光学和微波吸收（MWA）性能的影响，该材料在电磁干扰（EMI）屏蔽和隐身技术中具有潜在的应用前景。采用溶胶-凝胶自燃烧法合成了Ba0.5Sr0.5RuxFe12-xO19 （x = 0.00,0.05,0.10,0.15和0.20）材料，并利用XRD， FESEM和EDAX分析了材料的结构和形态特征。Rietveld精炼法证实了P63/mmc空间族六铁体结构的稳定性。对制备的六铁素体材料进行了FESEM分析，发现材料的颗粒尺寸在0.63 ~ 5.12 μm之间，结构有序。EDAX证实了Ba， Sr, Ru， Fe和O的存在，表明合成的MHF的纯度。光谱学分析表明，Ru掺杂量的增加导致非辐射复合导致光谱学强度降低。Ru³⁺在578 nm处有一个突出的发射峰，带隙能量从2.58 eV增加到2.83 eV，微波吸收性能得到改善，在10.08 GHz时，x = 0.15时的最小反射损耗（RL）为- 34.4 dB。这项工作证明了Ru³取代在增强介电性能、磁损失机制和阻抗匹配方面的协同作用，使这些材料成为8-12 GHz频率范围内定制电磁波吸收的理想候选材料。材料厚度起着至关重要的作用，越薄的样品在高频下表现出更好的微波吸收，而越厚的样品在低频下表现得更有效，这使得制备的MHFs适合电磁干扰（EMI）屏蔽。

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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.