静电场对介电性粒子沉积影响

利用非均匀电场力控制气-固两相分散系中的悬浮介电性微细粒子聚集形态,分析和探讨了静电场对介电性粒子沉积的影响.首先,经实验研究得到了介电粒子链形成的两个必要条件:有偶极子和非均匀梯度场的存在.然后,利用Al2O3粉体材料制备了纤维网状多孔陶瓷膜.分散在气体中的粒子在非均匀电场的作用下形成粒子链聚集体,沉积在基材表面,形成三维网状结构的多孔性附着层,经烧结,使附着层陶瓷化,增加力学强度,在基材表面得到纤维网状结构多孔陶瓷膜.

Effect of electrostatic field on deposition of dielectric particles

The aggregation morphology of suspension dielectric particle in non-uniform electric field was investigated based on gas-solid two-phase system.Meanwhile,the deposition of particle chains in electrostatic field was analyzed and discussed.Experiments were carried out to research into the formation condition of dielectric particle chains.Experimental results demonstrate that the existence of dipole and non-uniform gradient field is the necessary formation condition of dielectric particle chains.Moreover,porou...