Alkali-free glass for flat-panel display and founding process thereof

A technology of flat panel display and alkali-free glass, which is applied in the fields of boroaluminosilicate glass and alkali-free boroaluminosilicate glass. Yield rate and other issues to achieve the effect of reducing deformation

Inactive Publication Date: 2011-04-06
IRICO DISPLAY DEVICES
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Problems solved by technology

However, this process has high requirements on the control of the production process. The flow rate, temperature, and tension of the clamping machine must be controlled synchronously and accurately. A slight change may cause the excess

Method used

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Example Embodiment

[0038] The alkali-free glass of the present invention is made of SiO 2 、B 2 o 3 and Al 2 o 3 The formed glass network structure, in which SiO 2 +Al 2 o 3 +B 2 o 3 ≥80%, ∑RO (R is Mg, Ca, Sr, Ba, Zn) / Al 2 o 3 It is 0.9-1.2 (mass ratio). Among them, Si is the main component forming the glass network, Al 3+ When there is free oxygen supplied by RO, it can be [AlO 4 ] tetrahedra into the glass network, due to the Si 4+ is tetravalent, Al 3+ is trivalent, Al 3+ Replace Si 4+ After the electricity price is unbalanced, it is necessary to attract metal ions to occupy the network voids, which increases the integrity and strength of the network, thus increasing the viscosity and softening point of the glass.

[0039] General intermediate ions enter the network roughly in the following order when free oxygen is insufficient [BeO 4 ]→[AlO 4 ]→[GaO 4 ]→[BO 4 ]→[TiO 4 ]→[ZnO 4 ]. So when ΣRO (R is Mg, Ca, Sr, Ba, Be, Zn) / Al 2 o 3 0.9-1.2, satisfying Al first 3+ req...

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Abstract

The invention discloses alkali-free glass for a flat-panel display and a founding process thereof. The glass comprises the following components in percentage by mass: 54-68 percent of SiO2, 10.8-17.1 percent of Al2O3, 7.6-12.5 percent of B2O3, 0.2-1.8 percent of MgO, 4.2-15 percent of CaO, 0.6-7.1 percent of SrO, 0.1-5 percent of BaO, 0.2-1 percent of ZnO, 0.1-1.54 percent of ZrO2 and 0.1-1.3 percent of SnO+SnO2. The alumina borosilicate glass does not contain arsenic and stibium with larger environment pollution, reduces the content of gas impurities in the glass by a specific process and improves the glass quality.

Description

Technical field: [0001] The invention belongs to the field of glass, and relates to an alkali-free boroaluminosilicate glass, in particular to a boroaluminosilicate glass used for flat panel displays. Background technique: [0002] A liquid crystal display (LCD) is formed by enclosing liquid crystal between two glass substrates, and the liquid crystal is displayed by applying a voltage. The substrate has two functions, the first is to maintain a certain thickness of the liquid crystal; the second is to carry the transparent electrodes and switching elements necessary for driving. There is a strict size interval between the two substrate glasses, and the interval size is 5-10μm. [0003] In order to cope with the development of LCD technology, substrate glass has various compositions, manufacturing methods and characteristics. LCD has very strict requirements on the nature of the substrate glass itself and the quality of the panel. The requirements of LCD on the substrate g...

Claims

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Application Information

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IPC IPC(8): C03C3/093
Inventor 杨国洪段梓发王答成
Owner IRICO DISPLAY DEVICES
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