TY - JOUR
T1 - High-efficiency electromagnetic wave absorption of TiB2-SiCnws-SiOC synthesised using PDCs
AU - Feng, Pei
AU - Wei, Hanjun
AU - Xue, Jimei
AU - Shi, Yuhua
AU - Shang, Peng
AU - Zhang, Wenyuan
AU - Luo, Sihai
AU - Liang, Xiaoqing
AU - He, Weifeng
N1 - Publisher Copyright:
© 2023
PY - 2023/9
Y1 - 2023/9
N2 - A designed conductive nanoheterogeneous structure can boost interfacial polarisation and effectively enhance the wave absorption properties. Herein, maze-shaped nanoheterogeneous TiB2-SiCnws-SiOC ceramics were synthesised via a polymer-derived ceramics (PDCs) approach for constructing a three-dimensional reticular structure. The addition of TiB2 not only compensates for the lower conductivity, but also facilitates the growth of curved SiCnws. The results show that the addition of 20 wt% TiB2 leads to favourable microwave absorption performance, with a minimal reflection coefficient of − 55.1 dB at 8.9 GHz and an effective absorption bandwidth of 4.2 GHz. This can be ascribed to the synergistic effect among polarisation loss, conduction loss, and microwave multiple reflection and scattering due to the unique structure. This study may contribute towards establishing multi-loss mechanisms and controllable dielectric properties in PDCs.
AB - A designed conductive nanoheterogeneous structure can boost interfacial polarisation and effectively enhance the wave absorption properties. Herein, maze-shaped nanoheterogeneous TiB2-SiCnws-SiOC ceramics were synthesised via a polymer-derived ceramics (PDCs) approach for constructing a three-dimensional reticular structure. The addition of TiB2 not only compensates for the lower conductivity, but also facilitates the growth of curved SiCnws. The results show that the addition of 20 wt% TiB2 leads to favourable microwave absorption performance, with a minimal reflection coefficient of − 55.1 dB at 8.9 GHz and an effective absorption bandwidth of 4.2 GHz. This can be ascribed to the synergistic effect among polarisation loss, conduction loss, and microwave multiple reflection and scattering due to the unique structure. This study may contribute towards establishing multi-loss mechanisms and controllable dielectric properties in PDCs.
KW - Maze-shaped nanoheterogeneous
KW - Microwave absorption properties
KW - Polymer-derived ceramics
KW - TiB-SiCnws-SiOC ceramics
UR - https://www.scopus.com/pages/publications/85153875346
U2 - 10.1016/j.jeurceramsoc.2023.04.053
DO - 10.1016/j.jeurceramsoc.2023.04.053
M3 - 文章
AN - SCOPUS:85153875346
SN - 0955-2219
VL - 43
SP - 5207
EP - 5213
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 12
ER -