化工进展2025，Vol.44Issue(4)：2238-2249,12.DOI:10.16085/j.issn.1000-6613.2024-0630
泡沫碳化硅载体的微波电磁特性及吸波性能
Microwave electromagnetic characteristics and microwave absorbing properties of foam silicon carbide carrier
摘要
Abstract
Foam silicon carbide with different pore density and porosity was prepared by organic foam impregnation method,and its phase composition and microstructure were analyzed by XRD,SEM,BET and other testing methods.In order to explore the influence of temperature and pore structure on the electromagnetic characteristics and wave absorption performance of foam silicon carbide,the dielectric parameters of samples with different pore structure from room temperature to 400℃were measured by using the resonant cavity perturbation technique.The temperature rising behavior of foam silicon carbide with different pore structure was measured by using self-developed microwave tube furnace.The reflection loss of materials was tested using a vector network analyzer.The results showed that the real part of the complex dielectric constant of the prepared samples increased with the increase of temperature,and the highest real part value reached 6.72 at 400℃.As the pore density and porosity increased,the loss tangents of the samples increased with a maximum value of 0.037 at 400℃.The heating rate of the samples increased with the increase of power,pore density and porosity,reaching a maximum of 65.4℃/min at 1400W.The reflection loss of foam silicon carbide decreased regularly with the increase of pore density and porosity,and the minimum value was-12.8dB.The results showed that temperature and pore structure had a great influence on the electromagnetic properties and wave absorption properties of the samples.The higher the pore density and porosity,the stronger the wave absorption properties of foam silicon carbide.This work systematically studied the effects of pore structure and temperature on the microwave absorbing properties of foam silicon carbide,providing theoretical guidance for the research of microwave electromagnetic properties in the field of porous materials.关键词
泡沫碳化硅/孔结构/电磁特性/吸波性能/吸波机理Key words
foam silicon carbide/pore structure/electromagnetic characteristics/absorbing performance/absorption mechanism分类
矿业与冶金引用本文复制引用
黄粤东,高博涛,杨黎,姚思宇,郭胜惠,侯明..泡沫碳化硅载体的微波电磁特性及吸波性能[J].化工进展,2025,44(4):2238-2249,12.基金项目
国家重点研发计划(2022YFB4003100) （2022YFB4003100）
国家自然科学基金(52364051,52304400). （52364051,52304400）
