材料科学
陶瓷
二茂铁
微波食品加热
石墨
吸收(声学)
电介质
极化(电化学)
热解
复合材料
化学工程
光电子学
电极
物理化学
电化学
化学
物理
量子力学
工程类
作者
Yongjun Feng,Xue Guo,Hamada Elsayed,Kai Huang,Giorgia Franchin,Günter Motz,Yanchun Tong,Hongyu Gong,Paolo Colombo
标识
DOI:10.1016/j.ceramint.2023.05.035
摘要
SiCN(Fe) ceramics with excellent electromagnetic wave (EMW) absorption performance were successfully prepared from a preceramic polymer doped with ferrocene. Additive manufacturing (Digital Light Processing), providing enhanced structural design ability, was employed to fabricate samples with complex architectures. During pyrolysis, ferrocene catalyzed the in-situ formation of a large amount of turbostratic carbon, graphite and SiC nanosized phases, which formed carrier channels in the electromagnetic field and increased the conductivity loss. Meanwhile, it also increased the dipole polarization, interface polarization and the dielectric properties of the material, which finally enhanced the EMW absorption capacity of SiCN(Fe) ceramics. When containing 0.5 wt% ferrocene, the material showed good performance with EAB 4.57 GHz at 1.30 mm, and RLmin −61.34 dB at 2.22 mm. The RLmin of 3D-SiCN-0.5 ceramics was −6 dB, and the RL of the X-band was lower than −4 dB at 2 mm.
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