Abstract: The present disclosure provides optical glass, a method for preparing same and use thereof. The method includes the steps of: (1) weighing raw materials, and mixing them uniformly, the optical glass includes, in terms of the mass percentage of oxides: 40-50% La2O3, 15-25% Nb2O5, 10-20% Gd2O3, 5-10% GeO2, 5-10% B2O3, 1-6% TiO2, and 0.1-1% K2O; and (2) melting a mixed batch to obtain molten glass, and then introducing a gas into the molten glass for atmosphere bubbling, wherein the gas includes an inert gas and a reducing gas; the inert gas has a specific gravity greater than that of air at the same temperature and gas pressure; and the reducing gas makes the molten glass have a redox index of ?120 to ?5; after stopping the bubbling, homogenizing the molten glass to be clarified with stirring.

Abstract: The present application relates to the technical field of glass, in particular to an optical glass and a preparation method and application thereof. The optical glass comprises the following oxide component with the following weight percentage content, La2O3: 30%-40%; Ga2O3: 15%-25%; Nb2O5: 8%-18%; TiO2: 5%-10%; HfO2: 5%-10%; Ta2O5: 5%-10%; SiO2: 5%-10%; BaO: 2%-6%; RF3: 1%-3%, R may be one or both of La and Ga; and C: 0.005%-0.02%. The optical glass has a refractive index equal to or greater than 2.0, an internal transmittance at 440 nm equal to or greater than 93%, and a water resistance stability of grade 1, and can be used in the fields of virtual reality, digital cameras and vehicle display.

Abstract: A vacuum melting furnace for infrared glass, includes an upper furnace body and a lower furnace body that can be connected with each other or isolated from each other. Vacuum melting of the infrared glass is achieved in the upper furnace body wherein the influence of water in the environment is eliminated. The vacuum negative pressure environments can promote separation of hydroxyl in the structure, which achieves removing of hydroxyl in the glass, and then discharging of the molten infrared glass is conducted at atmospheric pressure in the lower furnace body. By using the vacuum melting furnace for infrared glass, infrared glass with good spectrum transmission performance can be obtained with improved property stability and optical homogeneity, which facilitates the preparation and molding of large sized and special-shaped infrared glass products.

Abstract: A vacuum melting furnace for infrared glass, includes an upper furnace body and a lower furnace body that can be connected with each other or isolated from each other. Vacuum melting of the infrared glass is achieved in the upper furnace body wherein the influence of water in the environment is eliminated. The vacuum negative pressure environments can promote separation of hydroxyl in the structure, which achieves removing of hydroxyl in the glass, and then discharging of the molten infrared glass is conducted at atmospheric pressure in the lower furnace body. By using the vacuum melting furnace for infrared glass, infrared glass with good spectrum transmission performance can be obtained with improved property stability and optical homogeneity, which facilitates the preparation and molding of large sized and special-shaped infrared glass products.