中文摘要：

基于原子力显微镜（AFM）测量了单个典型电站微米飞灰颗粒（粒径6μm）与石墨表面间的粘附力和静电力相互作用，获得了颗粒的表面能并考查了相对湿度对静电力的影响。在环境气氛下基本检测不到静电作用，而在真空下静电吸引作用显著。静电力主要来自颗粒一表面间的接触荷电，作用特性可以用一个简化的点电荷模型很好地定量描述。

英文摘要：

The interaction between a typical power plant fly ash particle （6 microns in diameter） and a flat graphite substrate is measured using atomic force microscope （AFM）. The surface energy of the particle is obtained and the influence of relative humidity on electrostatic force is investigated. Electrostatic attraction force is found to be significant in vaccum, while could hardly be detected under environment atmosphere. In the experiment, electrostatic force primarily originates from the contact charging of the particle, and could be quantitatively well described by a simplified point charge interaction model.