W型六角铁氧体的制备及吸波性能  

Preparation and EM Wave Absorbing Properties of W-type Hexaferrite

作　　者：午丽娟[1] 沈国柱[2] 徐政[2] 李荣斌[1] 黄立琴[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：《磁性材料及器件》2007年第5期29-32,共4页Journal of Magnetic Materials and Devices

摘　　要：首先用柠檬酸溶胶-凝胶（sol-gel）法制备了BaCo2Fe16O27型六角铁氧体，经不同温度焙烧后，分析产物的结构和形貌，确定出较优的焙烧温度，然后以此工艺制备W型Ba（Zn1-xCox）2Fe16O27（x=0，0．2，0．6，0．8，1．0）六角铁氧体，分析其吸波性能。研究表明，x=0．8时，样品的有效吸波带宽可拓宽到12-18GHz整个波段，吸收峰值可提高到-20dB。Citrate sol-gel process was used to prepare BaCo2Fe16O27 hexaferrite. After roasting at different temperatures, the microstructure and morphology of the samples were analysed to determine proper roasting temperature. Then, W-type Ba（Zn1-xCox）2Fe16O27 hexaferrite was prepared by the same process, and the microwave absorbing properties was studied, The results showed that the effective bandwidth is broadened to whole range of 12-18 GHz, with a maximum absorption of -20dB at x=0.8.

关 键 词：W型铁氧体 柠檬酸sol-gel法 反射率 

分 类 号：TM25[一般工业技术—材料科学与工程] TM277[电气工程—电工理论与新技术]