采用弓形法,对以水泥为基体,以掺合材硅灰和粉煤灰、石墨和碳纤维、纳米TiO2和钢纤维为吸波剂的试样,在8～18GHz频段内的吸波性能进行了分析,实验表明硅灰和粉煤灰、纳米TiO2和钢纤维与水泥复合制成的吸波材料具有良好的吸波效能,在8～18GHz频段内,其吸波效能随掺合材的含量增加而增大,但有一极限值。石墨和碳纤维与水泥复合制成的吸波材料的吸波效能较差,当石墨和碳纤维掺量为6%（质量分数）以上时,材料的吸波性能下降。硅灰和粉煤灰混合的最佳含量为30%（质量分数）左右,而纳米TiO2和钢纤维的最佳含量为纳米TiO24%（体积分数）、钢纤维4%（质量分数）左右。掺合材超过一定极限后,材料的透波能力增强,吸波性能便会下降。
With cement as matrix,silica fume and culver zed fuel ash,graphite and carbon fibers,nano-TiO2 and steel fibers as sampled absorbing agents,experiments to analyze their absorbing performance are conducted,applying arch method.Experimental results indicate that the previous three composite materials blended with cement all show preferable absorbing performance within 8-18GHz frequency band.Absorbing performance improves generally with increasing proportion of blended absorbing agents,though restricted by a peak value.Cement blended with graphite and carbon fiber demonstrates rather inferior performance.Its peak value comes when fraction of the composite is 6wt%,above which the composite＇s absorbing performance declines.For the rest,peak value is generated when the fraction of silica fume and culver zed fly ash is 30wt%,that of nano-TiO2 and steel fiber is 4vol% and 4wt% respectively.When absorbing agents exceed a certain threshold corresponding to the peak value,the composite＇s wave-penetrating property will enhance,while its absorbing performance will be reduced.
参考文献
| [1] | 司琼,董发勤.掺短碳纤维和石墨混凝土的低频电磁屏蔽性能[J].硅酸盐学报,2005(07):916-920. |
| [2] | 张雄,习志臻.建筑吸波材料及其开发利用前景[J].建筑材料学报,2003(01):72-75. |
| [3] | 司琼,董发勤.电磁屏蔽混凝土的发展现状[J].混凝土,2005(02):8-11. |
| [4] | 沈文忠,张雄.碳纤维功能混凝土研究现状及应用前景[J].新型建筑材料,2004(08):30-32. |
| [5] | 杨海燕,李劲,叶齐政,张秀成.钢纤维混凝土的吸波性能研究[J].功能材料,2002(03):341-343. |
| [6] | 熊国宣,邓敏,徐玲玲,宋碧涛,唐明述.隐身材料和隐身混凝土的研究现状与趋势[J].功能材料与器件学报,2003(04):486-492. |
| [7] | 巩晓阳,董企铭.吸波材料的研究现状与进展[J].河南科技大学学报(自然科学版),2003(02):19-22,33. |
| [8] | 王闯,李克智,李贺军,侯党社,黄敏.碳纤维增强水泥基复合材料的吸波性能研究[J].功能材料,2007(05):756-759,763. |
| [9] | 曾光群,康青,万步勇,冯孝杰,张彭成,沈志强.碳纤维对水泥基复合材料电磁屏蔽性能的影响[J].材料科学与工程学报,2006(03):448-450,453. |
| [10] | 左跃,叶越华,李坚利,陈阳如,熊国宣.水泥基电磁屏蔽与吸波材料的研究进展[J].硅酸盐通报,2007(02):311-315. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%