NiCl_(2)催化生长SiC纤维机理及吸波性能研究  

Study on the growth mechanism of SiC fiber catalyzed by NiCl_(2) and its microwave absorption

作　　者：郝稳定 张新月[1] 王高远 张靖博 关莉[1] 张锐[1,2] HAO Wending;ZHANG Xiyue;WANG Gaoyuan;ZHANG Jingbo;GUAN Li;ZHANG Rui(Zhengzhou University of Aeronautics,Zhengzhou 450015,China;Luoyang Institude of Science and Technology,Luoyang Henan 471023,China;Zhengzhou Foreign Language School,Zhangzhou 450044,China)

机构地区：[1]郑州航空工业管理学院材料学院,郑州450015 [2]洛阳理工学院,河南洛阳471023 [3]郑州外国语学院,郑州450044

出　　处：《功能材料》2023年第7期7108-7114,共7页Journal of Functional Materials

基　　金：国家自然科学基金项目(U21A2064);河南省科技攻关项目(222102230017,222102230075);河南省高等教育教学改革研究与实践项目(2021SJGLX230);ZUA教育教学改革研究与实践项目(ZHJYSC2202);ZUA研究生教育改革与发展研究项目(2022YJSJG31)。

摘　　要：以工业煤和正硅酸乙酯为原料,NiCl_(2)为催化剂,采用微波诱导催化合成SiC纤维,讨论了催化剂浓度、不同温度对SiC纤维的影响,研究了SiC纤维的吸波性能。利用X射线衍射、场发射扫描电子显微镜、矢量网络分析仪对合成产物进行了表征和吸波性能测试。结果表明,不同浓度的NiCl_(2)催化剂可生成多种形貌的SiC,当催化剂浓度为5%时,生成纳米SiC纤维;5%NiCl_(2)催化剂作用下,微波加热在900℃保温30 min即可制备出SiC,制备过程中形成的磁力线状Si-Ni化合物可促进SiC纤维的快速生成;SiC纤维厚度为4 mm毫米、频率为4.06 GHz时RL达到了-36.74 dB,表现出优异的电磁波吸收性能。研究结果为微波诱导制备高性能吸波SiC纤维提供理论和试验依据。Using industrial coal and ethyl orthosilicate as raw materials and NiCl_(2) as catalyst,the microwave-induced catalyst was used to synthesize SiC fibers.The effects of catalyst concentration and temperature on SiC fibers were discussed,and the microwave-absorbing properties of SiC fibers were studied.The products were characterized by X-ray diffraction,field emission scanning electron microscope and vector network analyzer.The results show that various morphologies of SiC can be formed by NiCl_(2) catalyst with different concentration.When the catalyst concentration is 5%,nano-SiC fibers can be formed.SiC can be prepared by microwave heating at 900℃for 30 min under the action of 5%NiCl_(2) catalyst.The magnetic linear Si-Ni compounds formed during the preparation process can promote the rapid formation of SiC fibers.When the thickness of SiC fiber is 4mm and the frequency is 4.06 GHz,the RL of SiC fiber reaches-36.74 dB,showing excellent electromagnetic wave absorption performance.The results provide theoretical and experimental basis for microwave induced preparation of high performance wave absorbing SiC fibers.

关 键 词：氯化镍 催化剂 3C-SIC 微波诱导 电磁波吸收 

分 类 号：TQ127[化学工程—无机化工]