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Production method of transparent microcrystal glass

A technology of glass-ceramic and its production method, which is applied in the field of glass-ceramic production, and can solve the problems of opacity and light transmittance, high expansion coefficient of glass-ceramic, and unsuitable application in fields of rapid cooling and rapid heating, etc.

Inactive Publication Date: 2005-03-23
JINGNIU GLASS CERAMICS GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Currently, glass-ceramic production generally adopts the following processes: raw material mixing, melting, nucleation treatment, crystallization treatment, cooling, etc. Different raw material components produce glass-ceramics of different colors and properties, but these glass-ceramics There are two major disadvantages: one is that most of these glass-ceramics are black or dark, opaque or low light transmittance
Second, these glass-ceramics have a high expansion coefficient and are not suitable for applications in rapid cooling and rapid heating.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: each component of this crystallized glass is by weight percentage:

[0016] SiO 2 : 63.0 Li 2 O: 3.8 CaO: 0.3 MgO: 0.04

[0017] Al 2 o 3 : 22.15 TiO 2 : 2.6 8 ZrO 2 : 1.48 P 2 o 5 : 1.0

[0018] BaO: 2.29 ZnO: 1.3 As 2 o 3 +Sb 2 o 3 : 1.16

[0019] B 2 o 3 : 0.5 and K 2 O+Na 2 O: 0.3

[0020] The above components are mixed, melted at 1650°C, shaped, then nucleated at 800°C for 2 hours, then heated to 900°C for crystallization for 0.5 hours, and the flexural strength is 25-150MPa after cooling, and the expansion coefficient is : -10×10 -7 / ℃--+10×10 -7 / ℃ transparent glass-ceramics.

Embodiment 2

[0021] Embodiment 2: each component of this crystallized glass is by weight percentage:

[0022] SiO 2 : 55.0 Li 2 O: 6.0 CaO: 0.2 MgO: 1.5

[0023] Al 2 o 3 : 22.5 TiO 2 : 4.0 ZrO 2 : 3.2P 2 o 5 : 0.3

[0024] BaO: 3.5 ZnO: 0.5 As 2 o 3 +Sb 2 o 3 : 0.8 B 2 o 3 : 2.0

[0025] and K 2 O+Na 2 O: 0.5

[0026] The above components are mixed, melted at 1480°C, molded, then nucleated at 600°C for 0.5 hours, and then heated to 850°C for crystallization for 3.5 hours. After cooling, the flexural strength is 25-150MPa, and the expansion coefficient is : -10×10 -7 / ℃--+10×10 -7 / ℃ transparent glass-ceramics.

Embodiment 3

[0027] Embodiment 3: each component of this crystallized glass is by weight percentage:

[0028] SiO 2 : 71.0 Li 2 O: 2.82 CaO: 0.36 MgO: 0.03

[0029] Al 2 o 3 : 16 TiO 2 : 1.6 ZrO 2 : 1.0P 2 o 5 : 1.5

[0030] BaO: 0.5 ZnO: 2.59 As 2 o 3 +Sb 2 o 3 : 1.5B 2 o 3 : 1.0

[0031] and K 2 O+Na 2 O: 0.1

[0032] The above components are mixed, melted at 1500°C, shaped, then nucleated at 450°C for 2 hours, then heated to 900°C for crystallization for 2.0 hours, and the flexural strength is 25-150MPa after cooling, and the expansion coefficient is : -10×10 -7 / ℃--+10×10 -7 / ℃ transparent glass-ceramics.

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Abstract

A process for preparing transparent microcrystalline glass features that the P2O5 and BaO are used as part of its raw material to generate a lot of nano-crystals and its crystallizing temp is controlled to less than 950 deg.C, resulting in nano-class crystals.

Description

Technical field: [0001] The present invention relates to a method for producing glass-ceramics. Background technique: [0002] Currently, glass-ceramic production generally adopts the following processes: raw material mixing, melting, nucleation treatment, crystallization treatment, cooling, etc. Different raw material components produce glass-ceramics of different colors and properties, but these glass-ceramics There are two major disadvantages: one is that these glass-ceramics are mostly black or dark, opaque or light transmittance is very low. The second is that these glass-ceramic expansion coefficients are high, so they are not suitable for the field of rapid cooling and rapid heating. Invention content: [0003] The object of the present invention is to provide a method for making glass-ceramics with high light transmittance and low expansion coefficient. [0004] In order to achieve this purpose, the technical solution adopted in the present invention is: the perc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B32/02C03C3/093C03C3/097C03C10/00
CPCC03C10/00C03C3/097
Inventor 王长林袁家裕刘为军李光亮王海菊
Owner JINGNIU GLASS CERAMICS GROUP
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