生物型吸波微粒的制备  

Preparation of biological absorbing particles

作　　者：张文强[1] 陈博[1] 詹天卓[1] 张德远[1] 

机构地区：[1]北京航空航天大学机械工程及自动化学院,北京100083

出　　处：《功能材料》2009年第5期826-829,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(59975007);国家高技术研究发展计划(863计划)资助项目(2001AA421120);武器装备预研基金资助项目(514180502.01.HK0101)

摘　　要：电磁波吸收微粒对于电磁防护和雷达波的吸收起着关键的作用。采用微生物作为模板，通过溶胶-凝胶处理，在微生物表面包覆了一层Fe3O4，制备了相应的生物吸波微粒，研究了产物的形貌、成份、微波磁参数。实验表明生物吸波微粒表面形成厚度〈3μm的尖晶石型铁氧体Fe3O4。包覆铁氧体的螺旋形生物吸波微粒性能良好。采用硅橡胶作为粘结剂制备了1．2mm厚的参杂螺旋形生物吸波微粒的涂层，结果显示该涂层在10～16GHZ内反射损失〉-10dB。Particles of electromagnetic wave absorbing take a key effect on the electromagnetic protection and the radar wave absorbing. In this paper,microorganisms are used as the substrate of the sol-gel coating processing. A layer of Fe3O4 was deposit on the microbial surface, and the corresponding absorbing particles are prepared. Developing the study of the morphology, composition ,microwave magnetic parameters. Experiments show that the layer of bio-absorbing particles, spinel ferrite Fe3O4, whose thickness is less than 3 microns. Spiral-shaped bio- logical absorbing particles,coated with ferrite,have a good performance. Silicone rubber is used as a binder prepared by 1.2mm thick mixed spiral of absorbing particles coating. The results showed that the reflective losses are more than -10dB in 10-16GHz.

关 键 词：微生物细胞 溶胶-凝胶 电磁吸波 磁导率 

分 类 号：TM25[一般工业技术—材料科学与工程] TM277.1[电气工程—电工理论与新技术]