Preparation of alkali borosilicate glass batches for heat resistant glass containing TFT-LCD glass cullet or waste glass

摘要

The present invention relates to a batch composition of alkali borosilicate-based heat resistant glass using, as raw materials, refused glass generated in a commercial production process of alkali-free alumina borosilicate-based substrate glass used for a thin film transistor liquid crystal display (TFT-LCD) and waste glass generated in a commercial production process of a TFT-LCD panel, and more particularly, to a batch composition of alkali borosilicate-based heat resistant glass, the batch composition containing 2 to 20 parts by weight of refused glass or waste glass of the alkali-free alumina borosilicate base TFT-LCD when silica or silica stone is 100 parts by weight among the batch composition to supply Al_2O_3 and B_2O_3 components, using expensive, natural and chemical raw materials less, and representing a thermal expansion coefficient of 26 - 45 X 10^-7/C. Therefore, a recycling scheme of the TFT-LCD refused glass and waste glass generated and directly discarded in a substrate glass production process is sought to actually apply the recycling scheme, thus reducing the generation of waste; and a more high-quality glass raw material is supplied cheaply compared to the natural and chemical raw materials used in a conventional heat-resistant glass production process, thus reducing energy use and air pollution caused by furnace erosion and volatilization. The present invention has an effect of considerably reducing production costs of the glass batch composition.