Papers by Keyword: Electrochemical Removal

Abstract: A laboratory-scale electrolytic cell with a Ti/RuO₂-Pt anode and a Ti cathode was developed to treat high concentration cyanide-contained wastewater. The effects of the different electrode distances, concentration of chlorine anion and current densities, on the CN^- removal were investigated. The results shown the too short and long electrode distance resulted in high energy consumption and low current, the appropriate electrode distance was essential. The CN^- removal was very significant at the electrode distance was 9 cm, and the removal efficiency reached 99.2%. The removal CN^- electrochemical oxidation was mainly attributed the success to in direct oxidation effect of chlorine /hypo-chlorite produced during the electrochemical reaction process. The CN^- removal efficiency increased with increasing the concentration of chloride ion and operating current density. The optimum experimental condition was set at the electrode distance of 9 cm, NaCl dosage of 0.5 g/L, the current density of 10 mA/cm², and pH of 12. At the optimum experimental condition, the CN^- concentration in the solution decreased from 150.33 mg/L to 1.20 mg/L, and the CN^- removal efficiency reached 99.2%.

Abstract: A bluge rotational tool has been developed as an effective precision electrochemical removal for the thin film nanostructures from LCD panels. This ultra-precise process effectively removes defective Indium-Tin-Oxide layers allowing LCD panels to be returned to the production line and significantly reduces costs. In the current experiment a 7th Generation TFT-LCD panel was used. A high rotational speed of the cheek rotational tool elevates discharge mobility and improves the removal effect. A negative electrode of large diameter with a small end radius provides higher current density and also improves the removal affect. Pulsed direct current can improve the effect of dregs discharge and is advantageous when combined with a higher electric power. A fast feed combined with a high current flow results in very effective removal of the color filter layer. This novel design using electrochemical removal as a precision recycling process for removing ITO layers from LCD panels is clean, effective and very fast.

Abstract: A effective method for the precision electrochemical removal of thin film nanostructures from LCD panels using a gear-shaped electrode tool has been developed. This ultra-precise process effectively removes defective Indium-Tin-Oxide layers allowing LCD panels to be returned to the production line and significantly reduces costs. In the current experiment a 7th Generation TFT-LCD panel was used. A high rotational speed of the gear-shaped negative electrode elevates discharge mobility and improves the removal effect. Pulsed direct current can improve the effect of dregs discharge and is advantageous when combined with a fast workpiece feed rate. A fast feed combined with a high current flow results in very effective removal of the color filter layer. A negative electrode of large diameter with a small edge radius provides higher current density and also improves the removal affect. This novel design using electrochemical removal as a precision recycling process for removing ITO layers from LCD panels is clean, effective and very fast.

Abstract: A mechanism design for the recycling process for removing the ITO-layer from color filter surface of TFT-LCD is presented. The defect rate of the ITO-layer is easily existent through the processes of semiconductor production. By establishing a recycling process for the ultra-precise removal of the thin film microstructure, the semiconductor optoelectronic industry can effectively recycle defective products, reducing both production costs and pollution. In the current experiment, the major interest is the design mechanism features of the removal process for a thin layer of ITO. For the recycling processes, a high flow velocity of the electrolyte provides a larger discharge mobility and a better removal effect. A thin thickness of the negative-electrode, an adequate gapwidth between the negative-electrode and the workpiece, or a higher working temperature corresponds to a higher removal rate for the ITO-layer. An adequate feed rate of the color filter combined with enough electric power produces a fast removal rate. An effective mechanism design and a low-cost recycling process using the electrochemical removal requires quite a short time to make the ITO layer remove easily and cleanly.