纳米TiO_2与水泥复合材料的吸波机理探讨  

Discuss microwave absorption theory of the cement-based composite doping nano-TiO_2

作　　者：熊国宣[1] 陈阳如 李坚利 叶越华 左跃 

机构地区：[1]东华理工学院化学工程与工艺系,江西抚州344000 [2]江西现代学院材料系,江西南昌330012 [3]江西省建材科研设计院,江西南昌330001

出　　处：《功能材料》2007年第5期836-838,841,共4页Journal of Functional Materials

基　　金：江西省自然科学基金资助项目(0650006);江西省教育厅科技资助项目(2006210)

摘　　要：纳米TiO2作为微波吸收剂,掺入到水泥材料中,使水泥基复合材料具有一定的吸波功能。通过对掺有锐钛型TiO2、纳米锐钛型TiO2和纳米金红石型TiO2的水泥基复合材料的导电性能、电磁参数和反射率的分析比较,探讨了纳米TiO2与水泥复合材料的吸波机理。由于纳米TiO2的小尺寸效应、表面效应和量子尺寸效应,使纳米TiO2与水泥复合材料在高频段体现更好的吸波性能,当纳米TiO2掺量为5%时,在12.5-18GHz频率范围内复合材料的反射率基本上都〈-0dB,最小反射率达-16.34dB。Nano-TiO2 as functional materials is adulterated in cement,and cement-based composite has the function of absorbing electromagnetic wave. The electric performance, electromagnetic parameter and reflectivity of cement-based composites doping anatase-TiO2, nano-anatase-TiO2 and nano-rutile-TiO2 were analyzed by contrasting,and the microwave absorption theory of cement-based composite doping nano-TiO2 was discussed. It has better microwave absorption capability in high frequency because the effects of smallness size,surface and quantum dimension of nano-TiO2. The reflectivity of cement-based composites with 5.0% nano-TiO2 is almost less than -10dB in 12.5 to 18GHz frequency range （KU wave band）,and its least reflectivity reaches -16.34dB.

关 键 词：纳米氧化钛 水泥 复合材料 吸波机理 

分 类 号：Q614.4[生物学—生物物理学] TU528[建筑科学—建筑技术科学]