Lightweight and robust SiO₂f/SiO₂ composites with superior dielectric properties via three-dimensional woven spacer technique

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

Ceramics International Pub Date : 2025-03-01 DOI:10.1016/j.ceramint.2024.12.262

Chunbing Yang , Yinuo Pan , Wuzhou Li , Fujun Xu

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引用次数: 0

Abstract

Lightweight, high-strength ceramic matrix composites with excellent dielectric properties are in great demand in strategic fields such as aerospace and wireless communication. Herein, a three-dimensional (3D) spacer SiO₂_f/SiO₂ composite with high porosity in the thickness direction was fabricated by combining 3D woven spacer quartz fabric with SiO₂ through a sol-gel process. As a result, the porous SiO₂_f/SiO₂ composite with a 3D woven spacer structure (SiO₂_f/SiO₂-3DWSS) exhibits a low volume density of 0.71 g/cm³, yet it can support over 30,000 times its own weight without any damage. Additionally, the as-produced SiO₂_f/SiO₂-3DWSS demonstrates an ultra-low dielectric constant (ε = 1.67), dielectric loss (tan δ = 7.2 × 10⁻³), and a high electromagnetic (EM) wave transmission coefficient (|T|² = 98.35 %). Furthermore, the dielectric properties of SiO₂_f/SiO₂-3DWSS demonstrate low sensitivity to temperature fluctuations, with the dielectric constant and dielectric loss changing by only 0.39 % and 7.54 %, respectively, when the ambient temperature reaches 400 °C. Simulations further reveal the advantage of SiO₂_f/SiO₂-3DWSS over solid structures in EM wave transmission. This work proposes a promising strategy for the design of advanced ceramic matrix composites characterized by lightweight properties and enhanced wave transmission.

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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.