Mechanism of metal removal from metal-coated plastics using pulsed power

IEEE Transactions on Dielectrics and Electrical Insulation(2019)

引用 3|浏览10
暂无评分
摘要
Recycling of electronic waste (E-waste) is an important subject from the viewpoint of resource conservation and environmental protection. Recently, application of pulsed power technology in the recycling field has attracted considerable attention. We have been investigating metal separation from CD-R as an example of metal-coated plastic, by applying pulsed power with concentric ring electrodes. We visualized discharges with an ultra-high-speed framing camera to clarify the mechanism of metal removal. During the first shot a fan-shape discharge was observed after the breakdown of a protective layer. It expanded until the current reached its peak value, and then gradually disappeared. The protective layer containing a metal layer was separated from the plastic substrate around the fan-shape discharge. Similar discharge pattern continued until the metal layer around the high voltage electrode was completely removed. Afterward, a surface discharge bridged between the high voltage electrode and the remaining metal layer, then continued with a fan shape. A similar discharge pattern lasted until complete removal of the metal layer. Precise observations revealed the characteristics of the fan-shape discharge, which was accompanied by the vaporization of the metal layer. Furthermore, the length and velocity of the discharge propagation were analyzed using an image processing software.
更多
查看译文
关键词
air gaps,discharges,recycling,electrodes,phase separation
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要