Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7992110 | Journal of Alloys and Compounds | 2018 | 8 Pages |
Abstract
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 2-18â¯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 â78.6â¯dBâ¯at 17.1â¯GHz when the thickness was 3.5â¯mm and the bandwidth of RL below â10â¯dB (90% absorption) was 1.6â¯GHz. It meant that the PDC-SiCN (Ni) ceramics might exhibit a promising prospect as microwave absorbing materials.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Yu Liu, Yurun Feng, Hongyu Gong, Yujun Zhang, Xiao Lin, Bingying Xie, Junjie Mao,