文献类型：期刊文献

英文题名：Ultra-lightweight porous ceramic-polymer composites with enhanced strength and dielectric temperature stability for temperature-stable antennas

作者：Zhang, Kun[1];Bao, Yunran[1];Zheng, Lian-Gang[3];Zhu, Fanqiang[1];Hong, Jianhan[1];Wu, Chenhui[4];Zou, Zhuanyong[1];Xu, Fujun[2]

机构：[1]Shaoxing Univ, Shaoxing Subctr Natl Engn Res Ctr Fiber Based Comp, Sch Text Sci & Engn, Shaoxing Key Lab High Performance Fibers & Prod, Shaoxing 312000, Zhejiang, Peoples R China;[2]Donghua Univ, Coll Text, Shanghai 201620, Peoples R China;[3]Shanghai Spaceflight Precis Machinery Inst, Res & Dev Ctr, Shanghai 201600, Peoples R China;[4]Sinochem High Performance Fiber Mat Co Ltd, Yangzhou 211400, Jiangsu, Peoples R China

年份：2025

卷号：51

期号：18

起止页码：25351

外文期刊名：CERAMICS INTERNATIONAL

收录：SCI-EXPANDED(收录号：WOS:001533660700030)、、EI(收录号：20251318130921)、Scopus(收录号：2-s2.0-105000958103)、WOS

基金：This work was financially supported by the Scientific Research Starting Foundation of Shaoxing University, China, and Key Projects of Public Welfare of Shaoxing (Grant No. 2024A11001) .

语种：英文

外文关键词：Microwave dielectric ceramics; Three-dimensional woven spacer composites; Dielectric temperature stability; Electrical properties; Patch antenna

外文摘要：Low-dielectric-constant ceramic-polymer composites with high strength and low loss have broad application prospects in wireless communication systems. A substantial enhancement in the temperature coefficient of resonant frequency (TCF) of polymer composites so far can only be obtained at a high ceramic loading, resulting in a high dielectric constant and low mechanical performance of polymer composites. Here, an ultra-lightweight porous ceramic-polymer composite (3DWSCs-ST-10) was proposed by incorporating SrTiO3 ceramics into a 3D woven spacer Kevlar fabric scaffold to serve as a paraelectric phase in the polyimide matrix. The 3DWSCs-ST-10 exhibited a high compressive strength (4.11 MPa) with a low density (0.31 g/cm3) and low dielectric loss of 0.0065, overcoming the conflict between strong mechanical properties and low dielectric loss. In addition, by incorporating SrTiO3 ceramics into Kevlar/polyimide composites as a compensator, the dielectric temperature stability of the composite is enhanced with a tau f of +1.06 ppm/degrees C, within a broad temperature range of -160 to 200 degrees C. Consequently, the resulting antenna exhibited stable resonant frequency under different temperatures with a S11 value lower than -20 dB and a peak gain value of 8.66 dB, demonstrating superb electromagnetic performances. This work provides a promising strategy for advanced ceramic-polymer composites with robust dielectric temperature stability and mechanical performance for wireless communication applications.