Glass ceramic and float producing process thereof

Abstract

The invention discloses glass ceramic and a float producing process thereof. The raw material of the glass ceramic contains calcium, and the total content of basic oxide is relatively high, the glass flattening and surface polishing can be carried out by means of gravity and surface tension of liquid glass in the production process, the glass is nucleated and crystallized stepwise in the heating process, and the glass ceramic with flat and smooth surface and excellent performance is finally obtained by controlling the nucleating temperature, the crystallizing temperature, the nucleating time, the crystallizing time and the amount of nucleating agent, and the problems of low yield, low production efficiency and high production cost in the glass ceramic production can be solved.

Description

technical field [0001] The present invention relates to a glass ceramics, in particular to a CaO-MgO-Al 2 o 3 -SiO 2 Systematic glass-ceramic and its float production process. Background technique [0002] Glass-ceramic has many advantages such as high hardness, compact structure, weather resistance, corrosion resistance, and frost resistance, and is widely used in many fields. It is widely used in the construction industry. Among the many color glass-ceramics on the market, white glass-ceramics has a huge demand and a high market share, especially in high-end interior decoration. [0003] At present, the production methods of glass-ceramics mainly include casting method, sintering method and rolling method. The production process is complex, the yield rate is low, and the production efficiency is low; The use consumes a large amount of labor, also causes waste of materials, and the production cost is high; the thickness of the plate is 13-18mm, and the thickness is rela...

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Problems solved by technology

[0003] At present, the production methods of glass-ceramics mainly include casting method, sintering method and rolling method. The production process is complex, the yield rate is low, and the production efficiency is low; Using it consumes a lot of labor, and also causes waste of materials, and the production cost is high; the thickness of the plate is 13-18mm, and the thickness is relatively thick

The calendering method has a wide range of applications, but most of the raw materials in the production contain fluoride, which is likely to cause environmental pollution, which does not conform to the current concept of "green production, low-carbon economy"

[0004] Chinese patent CN103588394 discloses a white fluorine-free rolled glass-ceramic and its production method. This patent provides a fluorine-free glass-ceramic production process, which solves the problem of fluorine environmental pollution. However, the patent uses an electric melting furnace The production method, the output is small, the production cost is high, and the production process is relatively complicated. At the same time, the clarifier is added to the patented formula, which increases the production cost

[0005] In view of the current situation, many researchers have proposed to use the float production process to produce glass-ceramics. After a lot of research, there are still many problems, such as easy to stain tin in the process of glass float throwing, react with tin, and difficult to control the process. Still need to break through the technical bottleneck

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