Preparation of red glass

Abstract

Disclosed is a process for preparing a red glass, which firstly agitates and mixes water and glycerol with dextrin evenly, then analytically pure CuCl, SnO, FeSO4*7H2O and coal dust are added thereto for agitation evenly for getting mixing slurries; secondly, the mixing slurries are poured into a ball grinding tank for ball grinding and sieving; finally, the sieved slurries are evenly coated on the cleaned glass surface, the slurries are put into a muffle furnace after natural drying and then are heated to the temperature of 400 DEG C from the room temperature, and the heat of the slurries is preserved for thirty minutes; then the temperature is heated to 580-600 DEG C and the heat is preserved for five to thirty minutes, thereafter the power supply is shut off, then the glass is cooled to under 50 DEG C following the furnace temperature, the glass is taken out and redundant cupric salt on the surface thereof is washed out by a soft fabric for getting the red glass with smooth and glabrous surface. The invention can be used for the diffusion coloring to flat glasses (including float glasses), bottle glasses and instrument glasses without the need for implementing the reducing atmosphere treatment to the sample, and the firing time is short. Therefore, the process has advantages of simple preparation technique, energy saving, environmental protection and wide range of applicability.

Description

technical field [0001] The invention relates to a method for preparing glass, in particular to a method for preparing red glass through ion diffusion. Background technique [0002] With the improvement of people's living standards, colored glass has attracted more and more people's attention, and red glass is especially favored by consumers for its bright colors. At present, there are two production methods of red glass: one is bulk colored red glass formed by high-temperature melting; the other is red glass formed by ion diffusion on the glass surface. Red glass prepared by fusion method includes cadmium selenium red, golden red, antimony red and copper red. The red glass prepared by the melting method not only uses a large amount of colorant, but also needs to be melted at a higher temperature. At the same time, this method usually requires secondary color development of the product at a certain temperature to achieve the color of the preparation. The purpose of bright r...

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Problems solved by technology

Therefore, its preparation process is more complex

In addition, there is another kind of diffusion coloring by using colored ion molten salt. The commonly used molten salt is made of cuprous chloride, cuprous chloride plus silver nitrate, etc. The heating temperature of the molten salt is 450-600°C. Red glass also needs to be treated in a reducing atmosphere, and the concentration of copper ions in the molten salt will gradually decrease with time during the preparation process of this method, making the color of the prepared product inconsistent. In addition, this method makes both sides of the glass It is red, and the amount of copper salt is large

[0003] Wang Weimin used dextrin and glycerol as fillers, FeSO 4 and zinc powder as reducing agent, add CuCl and CuSO 4 To make the glass red, this method still needs to be in a strong reducing atmosphere to obtain red glass, and in an oxidizing atmosphere, red glass with uniform coloring and stable quality cannot be obtained

Moreover, the added reducing agent zinc powder can be found in the mixing process that zinc has reduced copper to copper particles. In addition, this method can only be used for float glass

Wang Xiaoming used zinc powder, SnCl 2 and FeSO 4 As reducing agent, add CuSO 4 To make the glass red, this method still needs to be in a strong reducing atmosphere to obtain red glass, and in an oxidizing atmosphere, red glass with uniform coloring and stable quality cannot be obtained

Moreover, the added reducing agent zinc powder can be found in the mixing process that zinc has reduced copper to copper particles. In addition, this method can only be used for float glass

Liu Shujun studied the problem of copper red diffusion and coloring of float glass, and studied the influence of the amount of copper salt, heat treatment temperature and holding time on the main wavelength of glass tone, light transmittance, and absorption band wavelength. The holding time in the paper is too long, which wastes energy, and The specific formula and process system are not given

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