TY - JOUR
T1 - Reflectivity of carbon-fiber-reinforced cement-based composites against electromagnetic waves
AU - Li, Kezhi
AU - Wang, Chuang
AU - Li, Hejun
AU - Luo, Fa
AU - Hou, Dangshe
PY - 2007/10
Y1 - 2007/10
N2 - Carbon-fiber-reinforced cement-based composites were prepared and their fracture surfaces were observed by scanning electron microscopy. The reflectivities of the composites in the frequency ranges of 4-8 GHz and 8-18 GHz were measured by using the Naval Research Laboratory testing system to assess the electromagnetic interference through investigating the influence of carbon fiber contents of 0.2, 0.4, 0.6, 0.8, 1.0 wt% on their reflectivities. Results showed that all of the measured reflectivities data were less than -10 dB in the lower frequency range and there was mainly absorption of electromagnetic waves. However, the reflectivity was more than -10 dB when the fiber mass fraction was over 0.6% in the higher frequency range, and the electromagnetic waves were mainly reflected. As the mass fraction increased, the reflectivity changed. The minimum reflectivity in the lower frequency range was -15.1 dB when the mass fraction was 0.6%, whereas that in the higher frequency range was -19.3 dB when the mass fraction was 0.4%.
AB - Carbon-fiber-reinforced cement-based composites were prepared and their fracture surfaces were observed by scanning electron microscopy. The reflectivities of the composites in the frequency ranges of 4-8 GHz and 8-18 GHz were measured by using the Naval Research Laboratory testing system to assess the electromagnetic interference through investigating the influence of carbon fiber contents of 0.2, 0.4, 0.6, 0.8, 1.0 wt% on their reflectivities. Results showed that all of the measured reflectivities data were less than -10 dB in the lower frequency range and there was mainly absorption of electromagnetic waves. However, the reflectivity was more than -10 dB when the fiber mass fraction was over 0.6% in the higher frequency range, and the electromagnetic waves were mainly reflected. As the mass fraction increased, the reflectivity changed. The minimum reflectivity in the lower frequency range was -15.1 dB when the mass fraction was 0.6%, whereas that in the higher frequency range was -19.3 dB when the mass fraction was 0.4%.
KW - Carbon fibers
KW - Cement-based
KW - Electromagnetic waves
KW - Reflectivity
UR - http://www.scopus.com/inward/record.url?scp=36549063556&partnerID=8YFLogxK
M3 - 文章
AN - SCOPUS:36549063556
SN - 1002-185X
VL - 36
SP - 1702
EP - 1708
JO - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
JF - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
IS - 10
ER -