TY - JOUR
T1 - Plasma-sprayed ZrB2/Al2O3 ceramics with excellent high temperature electromagnetic interference shielding properties
AU - Qing, Yuchang
AU - Yao, Haoyang
AU - Li, Yang
AU - Luo, Fa
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2021/2
Y1 - 2021/2
N2 - The preparation, microstructures, complex permittivity and the electromagnetic interference (EMI) shielding properties of plasma-sprayed ZrB2/Al2O3 ceramics were investigated. The sprayed ceramics displayed high dielectric losses in terms of a high imaginary part of the complex permittivity in the range of 120–150, indicative of exceptional EMI shielding performance. The total EMI shielding efficiency (EMI SE) of 30 wt% ZrB2 filled Al2O3 ceramics is greater than 31 dB at 25℃ and 44 dB at 600℃ in the range from 8.2–12.4 GHz with a thickness of 1.2 mm. In addition, the ZrB2/Al2O3 ceramics still maintain high EMI SE and a long-term life at high temperature (600℃ for 300 h). Therefore, ZrB2/Al2O3 ceramics may be good candidates for high temperature EMI shielding materials with high EMI shielding efficiency and a long-term life.
AB - The preparation, microstructures, complex permittivity and the electromagnetic interference (EMI) shielding properties of plasma-sprayed ZrB2/Al2O3 ceramics were investigated. The sprayed ceramics displayed high dielectric losses in terms of a high imaginary part of the complex permittivity in the range of 120–150, indicative of exceptional EMI shielding performance. The total EMI shielding efficiency (EMI SE) of 30 wt% ZrB2 filled Al2O3 ceramics is greater than 31 dB at 25℃ and 44 dB at 600℃ in the range from 8.2–12.4 GHz with a thickness of 1.2 mm. In addition, the ZrB2/Al2O3 ceramics still maintain high EMI SE and a long-term life at high temperature (600℃ for 300 h). Therefore, ZrB2/Al2O3 ceramics may be good candidates for high temperature EMI shielding materials with high EMI shielding efficiency and a long-term life.
KW - Complex permittivity
KW - Electromagnetic interference
KW - Plasma spray processing
KW - ZrB/AlO ceramics
UR - http://www.scopus.com/inward/record.url?scp=85094560131&partnerID=8YFLogxK
U2 - 10.1016/j.jeurceramsoc.2020.10.031
DO - 10.1016/j.jeurceramsoc.2020.10.031
M3 - 文章
AN - SCOPUS:85094560131
SN - 0955-2219
VL - 41
SP - 1071
EP - 1075
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 2
ER -