Molten Large Diameter Glass Tube COE 3.3 Borosilicate Glass Collection Tube ODM

Large Diameter Molten Glass Tube Neutral Glass Tube

Heat-resistant glass (refers to a special glass that contains boric acid and silicic acid with strong heat resistance and can withstand changes in temperature difference between cold and heat It is not easy to break. It has a series of excellent properties such as low expansion, thermal shock resistance, high temperature resistance, corrosion resistance, and high strength. Its raw material price is higher than ordinary glass, and the manufacturing cost is also higher. Therefore, the selling price of heat-resistant glass is higher than that of ordinary glass and tempered glass. The glass is high. The heat-resistant glass material has a high safety factor and will never self-explode like tempered glass; the coefficient of thermal expansion is small, the range of resistance to rapid temperature changes (≥120°C) is large, and the maximum temperature of heat resistance is up to 1200°C. Heat-resistant glass Mostly used for utensils, baby bottles, experimental beakers, industrial boiler sight glasses, mechanical equipment window glass, etc.

Purpose is to eliminate permanent stresses in the glass products and structural imbalances. Glass is a poor conductor of heat. After molding, the inner surface layer and the temperature difference in the cooling process there. When the inner surface layer solidification viscous, the temperature difference is present, but there is stress relaxation. When the surface layer cooled to room temperature, this temperature difference will appear. Inner continued cooling shrinkage, tensile stress hampered by the surface, while the surface compressive stress, is permanent.