Microstructure and electromagnetic wave absorption properties of RGOSiBCN composites via PDC technology
Microstructure and electromagnetic wave absorption properties of RGOSiBCN composites via PDC technology
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PDC技术研究RGOSiBCN复合材料的微观结构和电磁波吸收性能
DOI：
10.1016/j.ceramint.2018.07.106
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发表时间：
2018
影响因子：
5.2
通讯作者：
Ye Fang
中科院分区：
文献类型：
--
作者：
Song Chaokun;Cheng Laifei;Liu Yongsheng;Zhao Mingxi;Ye Fang
在此，我们展示了通过聚合物衍生陶瓷（PDC）技术将氧化石墨烯（GO）融入碳氮化硅硼（SiBCN）陶瓷中，以提高介电和电磁波吸收能力。使用不同量的GO含量和退火温度来优化制造的复合材料的介电常数。结果表明，含有 10wt% GO 的 RGO-SiBCN 复合材料在 X 波段具有 -34.56dB 的优异电磁反射系数（RC）和 2.46GHz 的有效电磁吸收带宽（EAB）。 RGO-SiBCN复合材料性能的增强主要是由于导电损耗和极化损耗。此外，高温退火（1700°C）导致SiC纳米晶体沉淀并形成纳米级界面。因此，SiBCN的RC和EAB分别达到-46.73dB和3.32GHz。本研究为 SiBCN 基复合材料的制造和电磁波吸收性能提供了新的见解。人们认为SiBCN基复合材料具有优异的微波吸收性能，在广泛的应用中具有巨大的潜力。
Herein, we demonstrate the incorporation of graphene oxide (GO) into silicoboron carbonitride (SiBCN) ceramics by polymer derived ceramics (PDCs) technology to improve dielectric and electromagnetic wave absorption capacity. Different amounts of GO content and annealing temperatures are used to optimize the permittivity of fabricated composites. Results show that RGO-SiBCN composite, with 10 wt% GO, delivers excellent electromagnetic reflection coefficient (RC) of − 34.56 dB and effective electromagnetic absorption bandwidth (EAB) of 2.46 GHz in the X-band. Enhanced performance of RGO-SiBCN composite is mainly due to the conductive loss and polarization loss. Furthermore, high-temperature annealing (1700 °C) resulted in precipitation of SiC nanocrystals and formation of nanoscale interfaces. Hence, RC and EAB of SiBCN reached − 46.73 dB and 3.32 GHz, respectively. The present study provides novel insight into fabrication and EMW absorption performance of SiBCN-based composites. It is believed that SiBCN-based composite possess superior microwave absorption property and have great potential in a wide range of applications.