先驱体转化法制备富碳SiOC陶瓷纤维及其吸波性能研究  

Carbon Rich SiOC Fibres Derived from Ceramic Precursor for Microwave Absorption

作　　者：仲诚 侯永昭 杨雯 张丽娟 温广武 ZHONG Cheng;HOU Yongzhao;YANG Wen;ZHANG Lijuan;WEN Guangwu(School of Materials Science and Engineering,Shandong University of Technology,Zibo 255000,Shandong,China;School of Transportation and Verhicle Engineering,Shandong University of Technology,Zibo 255000,Shandong,China)

机构地区：[1]山东理工大学材料科学与工程学院,山东淄博255000 [2]山东理工大学交通与车辆工程学院,山东淄博255000

出　　处：《陶瓷学报》2023年第4期703-711,共9页Journal of Ceramics

基　　金：中国博士后基金面上项目(2020M682202);山东省重大创新工程(2019JZZY010440)。

摘　　要：以聚硅乙炔为原料,利用先驱体转化法制备了一种新型富碳SiOC陶瓷纤维吸波材料。该方法制备的轻质SiOC陶瓷纤维表面光滑无孔,直径在微米级范围内可调。经1200℃陶瓷化后,SiOC纤维基体中产生了大量的石墨化碳、非晶SiO_(2)和纳米SiC陶瓷相,这种Si OC纤维中会存在大量界面结构极大地增强了电磁波吸收性能。以此制备的吸波材料在填充量为30 wt.%、层厚为3.3 mm时,最小吸波强度RLmin就可达到-43.4 dB,有效吸收带宽(RL<-10 dB)为5.6 GHz。因此,SiOC纤维是良好的吸波材料,在吸波领域具有很大的潜力。A novel carbon rich SiOC ceramics fibres for microwave absorption were prepared with polysilylacetylene(PSA)as precursor.This lightweight SiOC ceramic fibers with a micro-level diameter are smooth in surface and pore-free.After heat treatment at 1200°C,multiple micro-nano phases generated in the SiOC matrix,including graphitized carbon,amorphous SiO2 and nano-SiC.The as-prepared SiOC ceramic fibers possessed much more interface structures,with enhanced microwave-absorbing capacity.The minimum reflection loss(RLmin)of the SiOC absorber(30 wt.%)reached-43.4 dB,while the effective absorption bandwidth(RL<-10 dB)is 5.6 GHz at a thickness of 3.3 mm.These results prove that the SiOC ceramics fibre is a potential candidate for microwave absorption.

关 键 词：陶瓷先驱体 SiOC纤维 吸波 

分 类 号：TQ174.75[化学工程—陶瓷工业]