材料科学
陶瓷
反射损耗
吸收(声学)
微波食品加热
镍
微观结构
复合材料
聚合物
无定形固体
电介质
纳米颗粒
光电子学
冶金
纳米技术
复合数
结晶学
化学
物理
量子力学
作者
Yu Liu,Yurun Feng,Hongyu Gong,Yujun Zhang,Xiao Lin,Bingying Xie,Junjie Mao
标识
DOI:10.1016/j.ceramint.2018.03.167
摘要
Nickel-containing polymer-derived SiCN ceramics (PDC-SiCN (Ni) ceramics) were prepared with different adding amounts of Ni nanopowders by a polymer-derived method. The compositions, microstructure, electromagnetic (EM) properties and microwave absorption properties of the PDC-SiCN (Ni) ceramics in the 2–18 GHz frequency range were investigated. Results showed that the Ni nanoparticles were distributed in the SiCN amorphous matrix. Moreover, the electromagnetic properties could be tuned by varying the Ni adding amounts. The best absorption properties with a maximum reflection loss (RL) of − 39 dB at 17.2 GHz was obtained in the PDC-SiCN (Ni) ceramics with 10 wt% adding amount and the effective absorption width (RL< −10 dB) was 1.7 GHz with a thickness of 2 mm. Thus the synergetic effect of both the dielectric and magnetic loss endowed the PDC-SiCN (Ni) ceramics with excellent microwave absorption performance.
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