采用机械共混法制备了导电炭黑填充天然橡胶/天甲橡胶(1:1)复合材料,研究了导电炭黑(CCB)含量对复合材料微观结构和电磁性能的影响。结果表明,随着CCB含量的增加,复合材料的导电率、吸波性能和介电损耗逐渐增强;当CCB含量为30 phr时,复合材料导电率、反射损耗和介电损耗正切分别为0.92 S/m、-42.07 d B和4.24。基于传输线理论的吸波机理分析发现,复合材料的吸波性能主要源于CCB网络的传导损耗、界面极化和多面散射,并与CCB的微观连通性密切相关。
A series of monolithic catalysts for methane combustion with different supports were prepared using impregnation method and the slurry of catalysts was coated on the surface of cordierite and characterized by XRD.The catalytic activities for methane combustion were assessed in a micro-reactor.The C3 monolithic catalysts have a marked effect and show high activity,good thermal stability and similar character to noble metal catalysts.The reason is that the support mixed OSM and YSZ-Al2O3（γ-Al2O3 modified by Y2O3 and ZrO2）has high surface and can resist high temperature and the synergistic effect of CeO2,Y2O3,ZrO2 and Co3O4 can resist forming the crystal of CoAl2O4 effectively.
