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Alkali-free electronic glass with low density and high strain point and preparation method thereof

A high-strain, low-density technology, used in glass manufacturing equipment, glass molding, manufacturing tools, etc., can solve problems such as affecting film deposition and poor chemical stability, and achieve the effect of simple preparation process and wide range of raw materials

Active Publication Date: 2020-08-04
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the chemical stability of the glass substrate is not good, the strong acid and strong alkali solution will leach out the components of the glass substrate, resulting in visible residues on the display or affecting film deposition

Method used

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  • Alkali-free electronic glass with low density and high strain point and preparation method thereof
  • Alkali-free electronic glass with low density and high strain point and preparation method thereof
  • Alkali-free electronic glass with low density and high strain point and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] An alkali-free glass substrate with low density and high strain point, the basic molar ratio of the glass is: 3% B 2 o 3 , 19.5% Al 2 o 3 , 57% SiO 2 , 20% MgO, 0% CaO, 0.5% SrO, plus 0.2% SnO 2 .

[0047] Its preparation method comprises the following steps:

[0048] 1) the molar percentage is 3% of B 2 o 3 , 19.5% Al 2 o 3 , 57% SiO 2 , 20% of MgO, 0% of CaO, and 0.5% of SrO are converted into mass percentages, that is, 3.22% of B 2 o 3 , 30.68% Al 2 o 3 , 52.86% SiO 2 , 12.44% of MgO, 0% of CaO, and 0.8% of SrO.

[0049] 2) Convert the weight percentage of the basic glass obtained in step 1 into the required amount of raw materials, and add 0.2 to 0.8% of the total mass of raw materials SnO 2 .

[0050] 3) Accurately weigh each raw material with an analytical balance, then put all the glass raw materials into a mortar or a mixer and mix them evenly to prepare a glass batch.

[0051] 4) Put the mixed glass raw material into a corundum crucible, and t...

Embodiment 2

[0056] An alkali-free glass substrate with low density and high strain point, the basic molar ratio of the glass is: 3% B 2 o 3 , 16.5% Al 2 o 3 , 60% SiO 2 , 20% MgO, 0% CaO, 0.5% SrO, plus 0.2% SnO 2 .

[0057] Its preparation method comprises the following steps:

[0058] 1) the molar percentage is 3% of B 2 o 3 , 16.5% Al 2 o 3 , 60% SiO 2 , 20% of MgO, 0% of CaO, and 0.5% of SrO are converted into mass percentages, that is, 3.29% of B 2 o 3 , 26.47% Al 2 o 3 , 56.73% SiO 2 , 12.69% of MgO, 0% of CaO, and 0.82% of SrO.

[0059] 2) Convert the weight percentage of the basic glass obtained in step 1 into the required amount of raw materials, and add 0.2 to 0.8% of the total mass of raw materials SnO 2 .

[0060] 3) Accurately weigh each raw material with an analytical balance, then put all the glass raw materials into a mortar or a mixer and mix them evenly to prepare a glass batch.

[0061] 4) Put the mixed glass raw material into a corundum crucible, and ...

Embodiment 3

[0066] An alkali-free glass substrate with low density and high strain point, the basic molar ratio of the glass is: 6% B 2 o 3 , 18% Al 2 o 3 , 54% SiO 2 , 18% MgO, 3.5% CaO, 0.5% SrO, plus 0.2% SnO 2 .

[0067] Its preparation method comprises the following steps:

[0068] 1) the molar percentage is 6% of B 2 o 3 , 18% Al 2 o 3 , 54% SiO 2 , 18% of MgO, 3.5% of CaO, and 0.5% of SrO are converted into mass percentages, that is, 6.46% of B 2 o 3 , 28.36% Al 2 o 3 , 50.14% SiO 2 , 11.21% of MgO, 3.03% of CaO, and 0.8% of SrO.

[0069] 2) Convert the weight percentage of the basic glass obtained in step 1 into the required amount of raw materials, and add 0.2 to 0.8% of the total mass of raw materials SnO 2 .

[0070] 3) Accurately weigh each raw material with an analytical balance, then put all the glass raw materials into a mortar or a mixer and mix them evenly to prepare a glass batch.

[0071] 4) Put the mixed glass raw material into a corundum crucible, an...

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Abstract

The invention relates to alkali-free electronic glass with low density and high strain point and a preparation method thereof. The glass comprises the following components in percentage by mole: 3 to7% of B2O3, 15 to 19.5% of Al2O3, 54 to 62% of SiO2, 0 to 20% of MgO, 0 to 15% of CaO and 0.5 to 2% of SrO. The preferable parameters are as follows: 6.5%-7% of B2O3, 15%-17% of Al2O3, 61%-62% of SiO2, 0-12% of MgO, 3%-15% of CaO, 0.5%-2% of SrO and 0.2%-0.8% of clarifying agent SnO2. The product is low in density, high in strain point and proper in thermal expansion coefficient, the density is 2.470-2.622 g / cm < 3 >, the strain point is 732-770 DEG C, the thermal expansion coefficient is 26.18-34.15 * 10 <-7 > / DEG C, and the requirement of a display screen for a high-performance electronic glass substrate can be met.

Description

technical field [0001] The invention relates to an alkali-free electronic glass material, in particular to an alkali-free electronic glass with low density and high strain point and a preparation method thereof. Background technique [0002] In the era of Internet dissemination of information, monitors play an indispensable role. Displays are mainly divided into two categories, the first category is CRT (cathode ray tube, Cathode Ray Tube, CRT), and the second category is FPD (flat panel display, FlatPanel Display). With the continuous development of society, the traditional CRT type display has been replaced by FPD. FPD is subdivided into a variety of different display technologies, such as TFT-LCD (Thin Film Transistor Liquid Crystal Display), FED (Field Emission Display, Field Emission Display), VFD (Vacuum Fluorescent Diode), PDP (Plasma Display, Plasma Display Panel), OLED (Organic Light Emitting Diode, Organic Light Emitting Diode), etc. Among them, TFT-LCD technolo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/091C03C1/00C03C6/04C03C4/00C03B19/02
CPCC03C3/091C03C1/004C03C1/00C03C4/00C03B19/02
Inventor 卢安贤刘建磊刘涛涌
Owner CENT SOUTH UNIV