Low-expansion-coefficient red transparent glass and preparation method thereof

Abstract

The invention discloses low-expansion-coefficient red transparent glass and a preparation method thereof. The low-expansion-coefficient red transparent glass is prepared from the following ingredients in percentage by weight: 58 to 61 percent of SiO2, 5 to 8 percent of Al2O3, 13 to 16 percent of B2O3, 5 to 8 percent of MgO, 0.5 to 1.5 percent of K2O, 0.5 to 1.5 percent of Li2O, 1 to 3 percent of CeO2, 1 to 4 percent of TiO2, 2 to 4 percent of ZnO, 0.5 to 2.5 percent of BaO and 1 to 2 percent of Cu2O. The preparation method comprises the following preparation steps of raw material crushing treatment, material proportioning, mixing, preheating, melting, cooling, pressing forming, annealing, fine grinding, inspection, drying, packaging and warehouse entering. Raw materials are subjected to crushing processing, so that the fineness is high; according to the preparation method, the preheating is performed, so that the coloring efficiency is improved; the prepared glass does not have stripes; the color is uniform; the expansion coefficient is low.

Description

technical field [0001] The invention relates to the technical field of glass preparation, in particular to a red transparent glass with a low expansion coefficient and a preparation method thereof. Background technique [0002] Objects expand and contract due to temperature changes. As the temperature rises, the amplitude of the thermal motion of the particles in the glass increases, the distance between the particles becomes larger, and the external performance is expansion. However, the increase of particle spacing must overcome the force between particles. For oxide glass, this force is the bond force 2z / r2 between various cations and oxygen ions. The greater the bond force, the greater the glass expansion. Difficult, the smaller the coefficient of thermal expansion; conversely, the greater the coefficient of thermal expansion of glass; the bond strength of the Si-O bond is greater, so quartz glass has a small coefficient of thermal expansion. [0003] Cuprous oxide is ...

AI Technical Summary

Problems solved by technology

[0004] At present, the SiO2-B2O3-Al2O3-Na2O system is the main method used in the production of glass with low thermal expansion coefficient and low refractive index. However, since SiO2 and Al2O3 are refractory components, the alkali metal content must be very low to make the expansion coefficient low, resulting in The high-temperature viscosity of glass is very high, and it is difficult to produce glass with quality indicators such as bubbles and streaks that meet the standard