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Production method of devitrified glass plate

A technology of glass-ceramics and production methods, applied in the field of building materials, can solve the problems of easy warping of plates, difficult discharge of air bubbles, high porosity, etc., and achieve the effects of good flatness, high production efficiency, and high density

Inactive Publication Date: 2002-09-04
北京盛康宁科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above production method belongs to the microbead sintering type, and the air bubbles are not easy to discharge during the sintering process, resulting in high porosity, and the plate is easy to warp during the cooling process, and the above method can only produce thicker plates with a thickness greater than 8mm

Method used

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  • Production method of devitrified glass plate
  • Production method of devitrified glass plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The following components are selected as the raw materials (% by weight) for preparing ultra-thin glass-ceramic plates:

[0024] SiO 2 64, Al 2 o 3 6, CaO 16, ZnO 4, BaO 4, Na 2 O+K 2 O 6,

[0025] where Na 2 O and K 2 The weight ratio of O is 1:1

[0026] (1) Mix the above raw materials evenly, put them into a glass melting furnace and heat them to 1400°C to melt into molten glass.

[0027] (2) Prepare the molten glass into glass plates with a thickness of 5 mm by using the float glass production process, and cut them into glass plates of 1.22×2.42 m respectively.

[0028] (3) Stack six 5mm thick glass plates together and put them on the shed plate of the kiln car. Insert high temperature resistant release paper between layers, such as figure 1 shown.

[0029] (4) Send the kiln car into the tunnel kiln for crystallization, the maximum heating temperature is 900°C, thus forming an ultra-thin glass-ceramic plate. The entire crystallization cycle takes 18 ho...

Embodiment 2

[0032] The following components are selected as raw materials (% by weight) for the preparation of glass-ceramic plates:

[0033] SiO 2 50, Al 2 o 3 10, CaO 18, ZnO 10, Na 2 O+K 2 O 11,Cr 2 o 3 1,

[0034] where Na 2 O and K 2 The weight ratio of O is 3:1

[0035] (1) Mix the above raw materials evenly, put them into a glass melting furnace and heat them to 1500°C to melt into molten glass.

[0036] (2) Prepare the molten glass into a glass plate with a thickness of 8 mm by using the flat-drawn glass production process, and cut the glass plate into a size of 1.22×1.22m.

[0037] (3) Stack three 8mm thick glass plates together and put them on the shed plate of the kiln car. A high temperature resistant talcum powder isolation layer is placed between the layers.

[0038] (4) Send the kiln car into the shuttle kiln, and crystallize at a temperature of 900°C to form a glass-ceramic thin plate. The entire crystallization cycle takes 16 hours.

[0039] (5) After lea...

Embodiment 3

[0041] The following components are selected as the raw materials (% by weight) for preparing the composite glass-ceramic plate:

[0042] SiO 2 60, Al 2 o 3 8, CaO 15, BaO 6, Na 2 O+K 2 O9, ZrO 2 1. TiO 2 1,

[0043] where Na 2 O and K 2 The weight ratio of O is 2:1

[0044] (1) Mix the above raw materials evenly, put them into a glass melting furnace and heat them to 1500°C to melt into molten glass.

[0045] (2) Prepare the molten glass into a glass plate with a thickness of 3 mm by using the flat-drawn glass production process, and cut the glass plate into a size of 1.22×2.42 m.

[0046] (3) Stack six 3mm thick glass plates together and put them on the shed plate of the kiln car. There is no isolation layer between the layers, and an isolation layer of alumina powder is placed between the glass plate and the shed plate.

[0047] (4) Send the kiln car into the tunnel kiln for heating and heat preservation to bond and crystallize the glass plates. The maximum ...

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Abstract

A production method of nucleated glass sheet material includes the following steps: firstly, uniformly mixing raw materials according to a certain proportion, heating to 1400-1550 deg.C in a glass melting kiln, making the molten glass into thin glass sheet, superimposing glass sheets together to make crystallization at 900-1200 deg.C, crystallization period is 5-20 hr., taking out from the kiln and making the nucleated glass sheet respectively undergo the procedures of finishing and polishing so as to obtain the ultrathin product. This invented method can be used for producing ultrathin nucleated glass decorative sheet, and can be used for producing nucleated glass sheet material with higher thickness. Its production efficiency is high and cost is low, and its product is high in compact density and good in high levelness.

Description

technical field [0001] The invention relates to a production method of a glass-ceramic plate, which belongs to the technical field of building materials. Background technique [0002] At present, the process of producing glass-ceramic plates by sintering method is that firstly, the raw materials such as minerals and chemicals are uniformly mixed according to the formula, then put into a glass melting furnace for melting, and quenched with water to make glass slag with a certain particle size; then put the glass slag into In the mold, it is sintered and crystallized in a crystallization kiln; finally, the crystallized glass-ceramic plate is cut, polished or further processed into a product. The above production method belongs to the microbead sintering type, and the air bubbles are not easy to discharge during the sintering process, resulting in high porosity, and the plate is easy to warp during the cooling process, and the above method can only produce thicker plates with a...

Claims

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Application Information

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IPC IPC(8): C03B32/00C03B32/02C03C10/06C03C10/10
CPCC03C10/00C03C3/087
Inventor 梁华巍梁开明王双喜
Owner 北京盛康宁科技开发有限公司
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