Glass ceramic and float producing process thereof

A technology of glass-ceramic and production process, applied in glass production and other directions, can solve the problems of environmental pollution, high production cost, low production efficiency, etc., and achieve the effects of reducing production cost, convenient forming process, and improving production efficiency

Active Publication Date: 2015-07-01
GLASS TECH RES INST OF SHAHE CITY OF HEBEI PROVINCE +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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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.

Method used

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  • Glass ceramic and float producing process thereof

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Experimental program
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Effect test

Embodiment 1

[0030] Raw material composition: CaO 5kg, MgO 9kg, Al 2 o 3 24kg, SiO 2 50kg, Na 2 O 4kg, K 2 O 2.5kg, ZnO 1kg, TiO 2 3kg, ZrO 2 1.5kg.

[0031] 1) The raw materials are weighed and mixed evenly in proportion, placed in a glass melting furnace and heated to 1560°C for melting and homogenization;

[0032] 2) The melted and homogenized glass enters the surface of the tin bath through the forehearth and is flattened at 1300°C, polished at 1170°C, and then thinned at 1005°C to obtain a 4mm thick glass ribbon. After the glass ribbon is cooled to 700°C Leave the tail end of the tin bath and enter the heat treatment kiln;

[0033] 3) After the glass ribbon enters the heat treatment furnace, it is nucleated at 730°C for 20 minutes, crystallized at 940°C for 45 minutes; uniformly annealed at 650°C for 20 minutes;

[0034] 4) After the glass is taken out of the heat treatment kiln, it is cut and polished to obtain the desired product.

Embodiment 2

[0036] Raw material composition: CaO 9kg, MgO 4kg, Al 2 o 3 16kg, SiO 2 54kg, Na 2 O 7kg, K 2 O 6kg, ZnO 0.5kg, TiO 2 2.5kg, ZrO 2 1kg.

[0037] 1) The raw materials are weighed and mixed evenly in proportion, placed in a glass melting furnace and heated to 1520°C for melting and homogenization;

[0038] 2) The melted and homogenized glass enters the surface of the tin bath through the forehearth and is flattened at 1280°C, polished at 1120°C, and then stacked at 995°C to obtain a 10mm thick glass ribbon. After the glass ribbon is cooled to 720°C Leave the tail end of the tin bath and enter the heat treatment kiln;

[0039] 3) After the glass ribbon enters the heat treatment furnace, it is nucleated at 720°C for 40 minutes, crystallized at 915°C for 48 minutes, and uniformly annealed at 620°C for 30 minutes;

[0040] 4) After the glass is taken out of the heat treatment kiln, it is cut and polished to obtain the desired product.

Embodiment 3

[0042] Raw material composition: CaO 8kg, MgO 8kg, Al 2 o 3 16kg, SiO 2 47kg, Na 2 O 3kg, K 2 O 7kg, ZnO 0.5kg, TiO 2 7kg, ZrO 2 3.5kg.

[0043] 1) The raw materials are weighed and mixed evenly in proportion, placed in a glass melting furnace and heated to 1500°C for melting and homogenization;

[0044] 2) The melted and homogenized glass enters the surface of the tin bath through the forehearth and is flattened at 1250°C, polished at 1173°C, and then stacked at 1000°C to obtain a 17mm thick glass ribbon. After the glass ribbon is cooled to 670°C Leave the tail end of the tin bath and enter the heat treatment kiln;

[0045] 3) After the glass ribbon enters the heat treatment furnace, it is nucleated at 700°C for 48 minutes, crystallized at 960°C for 54 minutes; uniformly annealed at 600°C for 45 minutes;

[0046] 4) After the glass is taken out of the heat treatment kiln, it is cut and polished to obtain the desired product.

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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...

Claims

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Application Information

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IPC IPC(8): C03C10/14C03B18/02
CPCY02P40/57
Inventor 程金树袁坚李雄伟章宇郑伟宏范亚伟张天瑞
Owner GLASS TECH RES INST OF SHAHE CITY OF HEBEI PROVINCE
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