Method and device for preparing light-induced dimming glass through float double-alloy groove

Abstract

The invention relates to a method for preparing light-induced dimming glass by a float double-alloy tank, which comprises the following steps: preparing glass components, melting formula component ingredients into molten glass through an electric melting furnace, and then feeding the molten glass into a first section of alloy tank through a runner to be molded into a required thickness; the formed glass is rapidly cooled and pulled to a roller way, the glass enters a crystal nucleus forming area, the temperature of the crystal nucleus forming area is 400-500 DEG C, the glass stays for 2-10 min, and silver halide crystal nucleation in the glass is completed; the nucleated glass is conveyed into a second section of alloy tank, the temperature is increased to 580-700 DEG C again, and growth of crystals in the glass is completed; and finally annealing and cooling in an annealing kiln, and cutting to obtain the product. According to the invention, a double-alloy tank series connection mode is adopted, a glass forming area and a crystallization area are respectively carried out in the two alloy tanks, and tin-silver-iron alloy liquid is used as a floating medium to replace a pure tin floating medium, so that a film layer is prevented from being generated by plasma replacement of tin and silver copper, the preparation time is short, and the production efficiency is high.

Description

technical field [0001] The invention relates to a method for preparing photosensitive dimming glass, in particular to a method and a device for preparing photosensitive dimming glass in a float double alloy tank. Background technique [0002] Photoswitchable glass is glass that absorbs light in the visible light region under the action of sunlight or ultraviolet rays, changes its own color or changes from colorless to colored glass, and the color gradually deepens as the intensity of sunlight or ultraviolet rays increases. , Glass that can return to its original color when there is no sunlight or ultraviolet rays. At present, this type of glass is produced by molding method and is mainly used in spectacle lenses. In the prior art, photosensitizers are generally introduced into common glass components to produce photochromic tinted glass. Commonly used glass types include aluminoborosilicate glass, borosilicate glass, borate glass, phosphate glass, etc. Commonly used photos...

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Problems solved by technology

[0006] For photosensitive flat glass, because its components contain silver halide, copper ions and gold ions, if the traditional float glass production process is adopted, the glass liquid is formed and crystallized in the tin bath, and the tin bath The tin liquid and the hydrogen in the protective gas have substitution and strong reduction properties, and it is easy to replace and reduce the silver ions in the glass liquid to silver atoms, thereby forming a film on the surface of the glass produced; secondly, using the same tin It is difficult to achieve the temperature and time of glass crystallization treatment for flat glass prepared in a tank. First, it is not easy to achieve a faster cooling rate for glass from forming to before crystallization. Second, a longer tin bath is required to meet the crystallization time. A substantial increase in equipment costs

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