TY - GEN
T1 - High temperature dielectric and microwave absorption properties of polymer derived SiCN ceramic in X band
AU - Li, Quan
AU - Yin, Xiaowei
AU - Kong, Luo
AU - Duan, Wenyan
AU - Zhang, Litong
AU - Cheng, Laifei
PY - 2014
Y1 - 2014
N2 - Polymer derived SiCN ceramic (PDC-SiCN) composed of SiC and Si 3N4 was obtained through pyrolysis of a kind of polysilazane at 1700°C in N2. The high temperature relative complex permittivities of PDC-SiCN were measured at temperatures from room temperature to 600°C in the X band (8.2-12.4 GHz). The average real permittivity, imaginary permittivity and loss tangent of PDC-SiCN were 12.2, 5.8 and 0.47 at room temperature, and increased to 14.4, 9.3 and 0.64, respectively. The microwave absorption property of PDC-SiCN was calculated using metal back-panel model. The average reflectivity of sample in X band with sample thickness of 2.05 mm at room temperature was -12.8 dB, and increased to -8.6 dB at 600°C. The decrease of the microwave absorption property was attributed to the impedance mismatch between air and sample with the increasing temperatures.
AB - Polymer derived SiCN ceramic (PDC-SiCN) composed of SiC and Si 3N4 was obtained through pyrolysis of a kind of polysilazane at 1700°C in N2. The high temperature relative complex permittivities of PDC-SiCN were measured at temperatures from room temperature to 600°C in the X band (8.2-12.4 GHz). The average real permittivity, imaginary permittivity and loss tangent of PDC-SiCN were 12.2, 5.8 and 0.47 at room temperature, and increased to 14.4, 9.3 and 0.64, respectively. The microwave absorption property of PDC-SiCN was calculated using metal back-panel model. The average reflectivity of sample in X band with sample thickness of 2.05 mm at room temperature was -12.8 dB, and increased to -8.6 dB at 600°C. The decrease of the microwave absorption property was attributed to the impedance mismatch between air and sample with the increasing temperatures.
UR - http://www.scopus.com/inward/record.url?scp=84903997699&partnerID=8YFLogxK
U2 - 10.1002/9781118932995.ch20
DO - 10.1002/9781118932995.ch20
M3 - 会议稿件
AN - SCOPUS:84903997699
SN - 9781118932988
T3 - Ceramic Transactions
SP - 195
EP - 202
BT - High Temperature Ceramic Matrix Composites 8 - A Collection of Papers Presented at the HTCMC 2013 Conference
PB - American Ceramic Society
T2 - 8th High Temperature Ceramic Matrix Composites Conference, HTCMC 2013
Y2 - 22 September 2013 through 26 September 2013
ER -