Microwave absorbing performance of polymer-derived SiCN (Ni) ceramics prepared from different nickel sources
Microwave absorbing performance of polymer-derived SiCN (Ni) ceramics prepared from different nickel sources
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不同镍源制备的聚合物SiCN(Ni)陶瓷的吸波性能
DOI：
10.1016/j.jallcom.2018.03.346
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发表时间：
2018-06
影响因子：
6.2
通讯作者：
Mao Junjie
中科院分区：
文献类型：
--
作者：
Liu Yu;Feng Yurun;Gong Hongyu;Zhang Yujun;Lin Xiao;Xie Bingying;Mao Junjie
采用聚合物衍生方法，采用不同镍源成功制备了一系列含镍聚合物衍生SiCN陶瓷（PDC-SiCN（Ni）陶瓷）。使用扫描电子显微镜（SEM）和透射电子显微镜（TEM）来观察陶瓷的微观结构。研究了 PDC-SiCN (Ni) 陶瓷在 2-18GHz 范围内的电磁和微波吸收性能。结果表明，陶瓷中的Ni纳米颗粒分散在非晶SiCN基体中，介电损耗和磁损耗的协同作用增强了材料的电磁衰减。以Ni粉为镍源的PDC-SiCN(Ni)陶瓷的最佳反射损耗(RL)为-78.6dB(在17.1GHz时厚度为3.5mm)，RL低于-10dB(90%吸收)的带宽为1.6GHz。这意味着PDC-SiCN(Ni)陶瓷作为微波吸收材料可能展现出广阔的前景。
A series of nickel-containing polymer-derived SiCN ceramics (PDC-SiCN (Ni) ceramics) were successfully prepared from different nickel sources following a polymer-derived method. The scanning electron microscopy (SEM) and transmission electron microscope (TEM) were used to peruse the microstructure of the ceramics. The electromagnetic and microwave absorption properties of PDC-SiCN (Ni) ceramics in the 2–18 GHz range were investigated. Results showed that the Ni nanoparticles in ceramics were dispersed in the amorphous SiCN matrix and the synergetic effect of dielectric and magnetic loss enhanced electromagnetic attenuation of the materials. The optimal reflection loss (RL) was found for the PDC-SiCN (Ni) ceramics with Ni powders as nickel source, being −78.6 dB at 17.1 GHz when the thickness was 3.5 mm and the bandwidth of RL below −10 dB (90% absorption) was 1.6 GHz. It meant that the PDC-SiCN (Ni) ceramics might exhibit a promising prospect as microwave absorbing materials.
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