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念珠状碳化硅/二氧化硅纳米线的制备及电磁波吸收性能
作者:郑海康1 武志红1 2 张路平1  倩1 蒙真真1  楷1 
单位:(1. 西安建筑科技大学材料科学与工程学院 西安 710055  2. 中钢集团洛阳耐火材料研究院有限公司 先进耐火材料国家重点实验室 河南 洛阳 471039) 
关键词:念珠状碳化硅/二氧化硅纳米线 微观结构 碳热还原 吸波性能 
分类号:TM25
出版年,卷(期):页码:2020,48(1):0-0
DOI:
摘要:

 通过一种简单、低成本的方法,以竹炭为碳源,在惰性气氛条件下碳热还原二氧化硅,成功制备了念珠状碳化硅(SiC)/二氧化硅(SiO2)纳米线。采用扫描电子显微镜、X射线衍射与X射线光电子能谱对念珠状SiC/SiO2纳米线的微观形貌、物相组成和化学组成进行了表征。结果表明:SiC纳米线表面光滑,直径约为150~200 nm;1~2 μm的珠状突起主要成分为SiO2,并均匀分布在SiC纳米线上。室温条件下,在X波段(8.2~12.4 GHz)测试了试样的复介电常数,并以传输线理论计算出样品在不同厚度的反射损耗。结果表明:当厚度为1.80 mm时,试样的有效吸收带宽(RL<–10 dB)为2.32 GHz,最小RL值达到–43.58 dB。

基金项目:
国家自然科学基金项目(51502236);先进耐火材料国家重点实验室开放基金(SKLAR201905);西安建筑科技大学基础研究基金(JC1496)。
作者简介:
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