硅酸盐学报

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 王倩1 蒙真真1 尚楷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)

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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