Production method for grinding-free and polishing-free black transparent microcrystalline glass plate

Abstract

The invention relates to a production method for a Li2O-A2O3-SiO2-series grinding-free and polishing-free black transparent microcrystalline glass plate. Because modified component niobium oxide is added into a formula, the fusing temperature of the glass can be lowered by adding the niobium oxide. The modified component niobium oxide has good crystallization performance and also has the physical properties that the crystallization temperature is lowered, the coefficient of expansion is lowered, and the like. In the calendaring molding equipment, because the traditional solid molded roll is changed into a hollow roller structure and an inner core rod is arranged in the hollow roller structure, circulating cooling water is introduced into the hollow roller during production; the temperature of a molded roll body can be accurately controlled by controlling the water inlet temperature, the water outlet temperature and the flow speed, and in addition, the roller can be evenly cooled; the microcrystalline glass plate calendered and molded by the roller is flat, and the obtained microcrystalline glass plate has a smooth and flat surface so as to satisfy the user requirement, and does not deform at the high temperature for a long time; because grinding treatment and polishing treatment are omitted in the product production process, two working procedures of grinding and polishing in the product process are reduced; and therefore, the product quality is improved, the production efficiency is improved, the production cost is lowered, the production environment for workers is improved, and the clean production is realized.

Description

technical field [0001] The present invention relates to a kind of Li 2 O-Al 2 o 3 -SiO 2 It is a production method of a non-grinding and non-polishing black transparent glass-ceramic plate. Background technique [0002] There are many types of glass-ceramics, and glass products for different purposes can be produced by different composition ratios and different processes. In 2005, the applicant applied for a Li 2 O-Al 2 o 3 -SiO 2 It is a Chinese invention patent for the composition of black transparent glass-ceramics and the production method of its products (patent number 2005100344556). This patent includes a method for producing heating plates and frying plates from black transparent glass-ceramics. The production process includes : (1) Ingredients; (2) Mixing; (3) Melting; (4) Cooling; (5) Calendering; (6) Annealing; (7) Crystallization; (8) Cutting; (9) Grinding Polishing; (10) trimming; (11) inspection; (12) printing; (13) drying; (14) finished product inspec...

AI Technical Summary

Problems solved by technology

Therefore, the production of existing glass-ceramics, especially large-plate glass-ceramics, has the disadvantages of large energy loss, low production efficiency, high product damage rate, and high additional cost. Because the grinding and polishing process must rely on a large amount of manpower, it not only wastes water, resources such as electricity, and the environment is heavily polluted, and the working environment for workers is poor

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