Device and method for inhibiting platinum group element particle defects in cover glass

Abstract

The invention discloses a device and a method for inhibiting platinum group element particle defects in cover glass. An electric potential difference measurement device and a direct current regulated power supply are connected between two non-contacted components in a glass channel, the electric potential difference measurement device and the direct current regulated power supply are both connected to a control device, the electric potential difference between non-directly connected components in a glass channel system is measured actually through the electric potential difference measurement device, then the control device controls the direct current regulated power supply in terms of applying reverse voltages with equal magnitude and opposite directions between the components generating electric potential difference in the glass channel system to offset the originally generated electric potential difference, thus eliminating the electrochemical corrosion root of platinum / rhodium alloy in high temperature molten glass so as to reach the purpose of reducing platinum / rhodium particle defects in cover glass. The device provided by the invention has a simple structure and is convenient for use, and can effectively inhibit cover glass platinum group element particle defects caused by electrochemical corrosion.

Description

technical field [0001] The present invention relates to a device for suppressing the electrochemical oxidation of platinum or platinum alloy used in the channel system of platinum or platinum group element alloy in the overflow down-draw method production process of the cover glass for liquid crystal display, in particular to a device for suppressing the electrochemical oxidation of the cover glass Devices with platinum group element particle defects. Background technique [0002] Cover glass for flat panel displays is usually made of alkali-free high alumina borosilicate glass. This type of glass has a high melting point and high surface tension, which makes the process of melting, homogenizing and clarifying the glass extremely difficult. At the same time, the flat panel display has extremely high requirements on the defects of solid inclusions such as stones and gaseous inclusions such as bubbles in the cover glass that affect its optical and surface coating properties. ...

AI Technical Summary

Problems solved by technology

[0006] Although the above existing conventional countermeasures have greatly reduced the occurrence rate of platinum / rhodium particle defects in the cover glass in actual production, the occurrence rate of platinum / rhodium defects is still the most important melting defect in actual production, and its serious Restricts the production yield and the improvement of the cover glass grade

Images