掺铁氧体和SiC纤维水泥基复合材料的吸波性能  

ELECTROMAGNETIC WAVE ABSORBING PROPERTIES OF CEMENT-BASED COMPOSITE DOPED WITH FERRITES AND SiC FIBERS

作　　者：午丽娟[1] 沈国柱[2] 徐政[2] 李荣斌[1] 胡雅育[1] 

机构地区：[1]上海电机学院机械工程系,上海200240 [2]同济大学材料科学与工程学院,上海200092

出　　处：《硅酸盐学报》2007年第7期904-908,共5页Journal of The Chinese Ceramic Society

摘　　要：用溶胶凝胶法制备了W型Ba(Zn1-xCox)2Fe16O27六方铁氧体,并以铁氧体和短切SiC纤维与水泥复合,制备了水泥基复合材料。测量了该材料的电磁参数,并计算了该材料对电磁波的反射率。结果表明:x为0.8时,W型Ba(Zn1-xCox)2Fe16O27六方铁氧体的吸波性能最好,该铁氧体的掺量(质量分数)为35%和短切SiC纤维掺量(质量分数)为0.2%时,水泥基复合材料在12～18GHz范围内具有最大反射率-13.5dB,有效带宽达到4.7GHz。W-type Ba（Zn1-xCox）2Fe16O27 hexaferrites were prepared by sol-gel method, and cement was filled with ferrite and short SiC fibers to prepare cement-matrix composites. The electromagnetic parameters of the composites were measured, and their reflectivity of electromagnetic waves was calculated. The results show that the absorptivity of the hexaferrite is the best at x=0.8, and the maximal reflectivity in the fi＇equency range of 12-18 GHz of the composite filled with the 35% （in mass） ferrite and 0.2% （in mass） short SiC fibers is -13.5 dB. The effective bandwidth reaches 4.7 GHz.

关 键 词：水泥 六方晶系铁氧体 碳化硅纤维 电磁参数 反射率 

分 类 号：TB332[一般工业技术—材料科学与工程]