Force and current in a contact gap between single highly resistive particles: experimental observations
Force and current in a contact gap between single highly resistive particles: experimental observations
复制标题
DOI：
10.1088/2399-6528/ab3e2b
复制
发表时间：
2019-09
影响因子：
1.2
通讯作者：
Alpesh Laxman Vora;Jan Stepputat;U. Riebel
中科院分区：
文献类型：
--
作者：
Alpesh Laxman Vora;Jan Stepputat;U. Riebel
在通过高电阻粉尘层进行导电的情况下，静电粘附力的产生与固体中的电（电流）传输机制密切相关。高场强导致粘接力显著增加。在这里，通过微观尺度上的实验，对潜在机制有了更多的了解。描述了一种实验安排，它允许研究受强电场作用的粒子对。电流和粒子间的作用力（150 μm）都可以测量为电压和间隙距离的函数。结果表明，在高阻粒子的情况下，接触具有极其复杂的行为。对于电流输运，可以观察到气体放电和热离子场发射，这取决于接触间隙的宽度和场强。对于穿过间隙的力和电流，观察到具有明显时间效应的强烈非线性行为。
In case of electrical conduction through highly resistive dust layers, the generation of electrostatic adhesion force is strongly coupled to the mechanism of electrical (current) transport in the solid. High field strengths lead to a significant increase of the adhesive force. Here, more insight into the underlying mechanisms is given by experiments on the microscopic scale. An experimental arrangement is described which allows to study a particle pair subject to a strong electric field. Both the current and the force between the particles (150 μm) can be measured as a function of voltage and gap distance. The results show an extremely complex behaviour of the contact for the case of highly resistive particles. For current transport, both gas discharges and thermionic field emission are observed, depending on the width of the contact gap and the field strength. For both the force and the current across the gap, a strongly non-linear behaviour with pronounced time effects is observed.