中文摘要：

研究了膨胀石墨对8mm电磁波的干扰特性，指出膨胀石墨的膨胀尺度是影响遮蔽效果的重要参量，并依据毫米波雷达的衰减机制确定了酸化石墨的粒径与厚度。应用扫描电镜观测样品膨胀前后的表观形貌。以H2SO4-CH3COOH-GIC为例，对膨胀石墨型气溶胶的粒度分布、沉降速度及其在8mm波频段内的衰减率进行了测试、计算与分析，研究了膨胀倍率随膨化温度、时间变化的规律。研究结果表明，膨胀石墨是一种高效、新颖的发烟剂，对军用毫米波雷达（36GHz）干扰作用显著。

英文摘要：

The property of expanded graphite interfering 8 mm wave was studied. The result indicates that expanded scale is the most important parameter to affect shielding effect. According to incidence light loss mechanism of millimeter wave radar, particle size and thickness of expandable graphite were determined. With scanning electron microscope （SEM）, the surface figures of samples were observed. Taking H2SO4-CH3COOH-GIC as an example, the granularity, fall rate and attenuation of aerosol material was calculated and tested. Moreover, effects of expanded temperature, time on expanded multiplication rate were discussed. The results show that expanded graphite is a kind of new, effective smoke material which can interfere military millimeter wave radar at frequency of 36 GHz.