Preparation method of red hard glass

Abstract

The invention discloses a preparation method of red hard glass. The preparation method of the red hard glass comprises the following steps of accurately weighing KNO3, K2SO4, KOH, Cu2O, SnO, FeO, CoO, FeSO4.7H2O and water according to a mass ratio of (3 to 9): (3 to 5): (1 to 4): (8 to 15): (5 to 9): (3 to 5): (1 to 2): (5 to 9): (5 to 15), carrying out mixing ball milling to obtain coloring paste, uniformly coating the coloring paste on the surface of cleaned hard glass, carrying out heat treatment, and scrubbing to remove the redundant coloring paste on the surface of the cleaned hard glass and to obtain the red hard glass as a sample. Through exchange of Cu<+> ions and K<+> ions, a diffusion rate of the Cu<+> ions in the cleaned hard glass as a sample is improved. The red hard glass obtained by the preparation method has a uniform color, stable quality and a smooth and bright surface. The preparation method of the red hard glass can be controlled easily, avoids secondary reduction treatment on a sample, and has short sintering time.

Description

technical field [0001] The invention relates to a preparation method of hard glass, in particular to a preparation method of red hard glass. Background technique [0002] Hard glass is a glass with good thermal and chemical stability, and its linear expansion coefficient is (40-60)×10 -7 ℃ -1 Among them, the chemical stability is between the water resistance level I-II, and only a few of them are level III. This type of glass such as Jena20, China 2 # , the former Soviet Union 846 # Wait. Hard glass is divided into two types: one is high in boron, and the other is low in boron. Alkali metal R in hard glass 2 The O content is generally less than 10% (mass fraction), usually about 6%, and the alkali metal content is far less than that of ordinary glass (the alkali metal content of ordinary glass is about 14%). Therefore, the surface diffusion coloring of hard glass is generally silver-copper diffusion, and the color is mainly brown, but it is difficult to make bright re...

AI Technical Summary

Problems solved by technology

Wang Weimin et al. 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. 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 and others 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 and others studied the problem of copper red diffusion and coloring of float glass, and studied the influence of copper salt dosage, 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 did not give specific formula and process system ([1] Wang Bolu, Xu Yonglin. Color and spectrum of copper diffusion colored float glass [J]. Southwest Normal University Journal, 2004: 2-3. [2] Yuan Yisong, Wu Baicheng, Luo Hongqi. Colored glass [M]. Beijing, Light Industry Press, 1988.: 353-358. [3] Dong Dexiang, Fan Shuangjing. Study on the diffusion and coloring of silver and copper ions [J]. Hubei, Wuhan University of Technology Journal, 2004: 1-3. [4] Liu Junshu. Research on the diffusion and coloring of copper red float glass [J]. Hubei, Wuhan University of Technology Journal, 1999, 16: 3-4. [5] Li Shaochen. The mechanism of diffusion coloring on the surface of flat glass Discussion [J]. Journal of Dalian Institute of Light Industry, 1999: 2-3. [6] Wang Weimin. Trial production and production of diffusion coloring-silver glass [J]. Zhejiang Haimen Glass Factory, 2005, 9: 3-5.)

CN101279819 and CN101717934A disclose a method for preparing ion diffusion colored products without secondary reduction, but the method is suitable for ion diffusion coloring of glass with high alkali metal content in glass, and for hard glass with low alkali metal content, Poor or even impossible to color

[0005] In summary, red hard glass has broad application prospects. At present, there are few reports in the published literature on the preparation of red glass by ion diffusion for hard glass. However, red hard glass can be prepared without secondary treatment. The study of quality glass has not been reported at home and abroad

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