Purple transparent glass with low expansion coefficient and preparing method thereof

Abstract

The invention discloses a purple transparent glass with low expansion coefficient and a preparing method thereof. The purple transparent glass is prepared from, by weight, SiO2 60-63%, CaO 1-4%, Al2O3 7-10%, B2O3 17-20%, Na2O 0.2-1%, Li2O 0.2-1%, CeO2 1-2%, TiO2 1-2%, ZnO 0.5-2.5%, ZrO2 1.5-2.5% and MnO2 1-2%; the preparing method comprises the steps of preparing materials, mixing, batch deironing treatment, fusion, cooling, compressing moulding, annealing, heat treatment, accurate grinding, testing, stoving, packaging and putting in storage. The batch of purple transparent glass with low expansion coefficient has low iron content by deironing treatment, glass coloring is not affected, and the prepared glass has small plane stress, uniform color and low expansion coefficient by low temperature heat treatment after annealing.

Description

technical field [0001] The invention relates to the technical field of glass preparation, in particular to a purple 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] Manganese diox...

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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