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Alkali-free glass and method for manufacturing same

An alkali-free glass and glass technology, applied in optics, instruments, nonlinear optics, etc., can solve the problems of thermal expansion difference between glass and TFT materials, glass deformation or bending, pixel pitch distortion, etc., to improve portability and reduce melting temperature. , the effect of reducing the processing temperature

Active Publication Date: 2014-04-09
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the glass has insufficient heat resistance, the glass may warp or warp, and may even crack due to tensile stress caused by heat
Also, in the case of glass used for TFT-LCD, if its heat resistance is low, a difference in thermal expansion between the glass and the TFT material will occur, and the pixel pitch of the TFT may be distorted causing display errors

Method used

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  • Alkali-free glass and method for manufacturing same
  • Alkali-free glass and method for manufacturing same
  • Alkali-free glass and method for manufacturing same

Examples

Experimental program
Comparison scheme
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Embodiment

[0058] The raw materials of the respective components were combined so as to have the composition (wt %) shown in Table 1, and the combined material was placed in a platinum crucible and heated to a temperature of 1600° C. for 3 hours to melt it. During melting, stir for 1 hour using a platinum stirrer to make it homogeneous. The molten product was slowly cooled to 730°C to obtain glasses corresponding to the respective examples. The composition of the obtained glass was confirmed by X-ray fluorescence analysis.

[0059] Furthermore, the following properties were evaluated for the resulting glass, namely density, coefficient of thermal expansion, T 2 and T 4 , and the results are shown in Table 1.

[0060]

[0061] The density of glass is measured according to the Archimedes principle.

[0062]

[0063] The average coefficient of thermal expansion of glass is measured using a dilatometer.

[0064] 2 >

[0065] Use a high temperature viscometer to measure the viscosit...

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Abstract

Disclosed are a structure for alkali-free glass which does not comprise alkali metal oxides, and a method for manufacturing such glass. The alkali-free glass according to the present invention contains 46-57% SiO2, 3.5-7.5% B2O3, 21-29% Al2O3, 3-14% MgO, 11-16% CaO, and 1-5% SrO, in terms of weight % of oxides, and does not substantially contain alkali metal oxides.

Description

technical field [0001] This application claims the priority of Korean Patent Application No. 10-2011-0089046 and No. 10-2012-0096358 filed in Korea on September 2, 2011 and August 31, 2012, respectively, both of which The disclosure of the patent application is incorporated into this application by reference. [0002] The invention relates to glass manufacturing technology, more specifically, to an alkali-free glass composition without alkali metal oxides and a preparation method thereof. Background technique [0003] Glass, especially sheet glass, is applied in various ways to window panes, vehicle windows and mirrors, and takes many different forms depending on the type and use of the glass. [0004] Among various types of flat glass, an alkali-free glass substrate is widely used in flat panel display devices, such as liquid crystal displays (LCDs), plasma display panels (PDPs), and organic electroluminescent (EL) devices. This is because the alkali metal oxide-containin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/085C03C3/087C03C3/091G02F1/13
CPCC03C3/091C03C3/085C03C3/087G02F1/13
Inventor 李东权方晸湜金相国林原培金秀恒金达正
Owner LG CHEM LTD
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