TY - JOUR
T1 - Effect of the pyrolytic carbon (PyC) content on the dielectric and electromagnetic interference shielding properties of layered SiC/PyC porous ceramics
AU - Wang, Chenhao
AU - Liu, Yongsheng
AU - You, Qiangwei
AU - Ye, Fang
AU - Cheng, Laifei
N1 - Publisher Copyright:
© 2018 Elsevier Ltd and Techna Group S.r.l.
PY - 2019/4/1
Y1 - 2019/4/1
N2 - A novel layered SiC/pyrolytic carbon (PyC) porous ceramic was synthesized from a nickel foam substrate via low-pressure chemical vapor infiltration (LPCVI) with SiCl3CH3-NH3-BCl3-H2-Ar. The microstructure and phase composition of the PyC deposited via Ni catalysis were investigated. In addition, the effect of the PyC content on the microstructure, conductivity, and electromagnetic shielding effectiveness of a two-layered SiC/PyC porous ceramic were discussed. Both the electrical conductivity (from 0.090 to 0.319 S/cm) and the total shielding effectiveness (from 19.2 to 29.0 dB) of the two-layer SiC/PyC porous ceramic (pore size: 200–400 µm) increased with the PyC content. The high-temperature shielding effectiveness of the sample showed an outstanding stability with temperature and remained nearly unchanged (only 2 dB variation) over the 25–600 °C temperature range.
AB - A novel layered SiC/pyrolytic carbon (PyC) porous ceramic was synthesized from a nickel foam substrate via low-pressure chemical vapor infiltration (LPCVI) with SiCl3CH3-NH3-BCl3-H2-Ar. The microstructure and phase composition of the PyC deposited via Ni catalysis were investigated. In addition, the effect of the PyC content on the microstructure, conductivity, and electromagnetic shielding effectiveness of a two-layered SiC/PyC porous ceramic were discussed. Both the electrical conductivity (from 0.090 to 0.319 S/cm) and the total shielding effectiveness (from 19.2 to 29.0 dB) of the two-layer SiC/PyC porous ceramic (pore size: 200–400 µm) increased with the PyC content. The high-temperature shielding effectiveness of the sample showed an outstanding stability with temperature and remained nearly unchanged (only 2 dB variation) over the 25–600 °C temperature range.
KW - Electrical conductivity
KW - Electromagnetic shielding effectiveness
KW - Layered SiC/PyC porous ceramic
KW - Low-pressure chemical vapor infiltration (LPCVI)
KW - PyC content
UR - http://www.scopus.com/inward/record.url?scp=85058058359&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2018.12.028
DO - 10.1016/j.ceramint.2018.12.028
M3 - 文章
AN - SCOPUS:85058058359
SN - 0272-8842
VL - 45
SP - 5637
EP - 5647
JO - Ceramics International
JF - Ceramics International
IS - 5
ER -