Manufacturing method of glass substrate for flat glass

A glass substrate, flat glass technology, applied in the manufacture of discharge tubes/lamps, ships or lead-in wires, glass production, etc.

Inactive Publication Date: 2012-02-01
ASAHI GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, when the silver paste is fired to form a silver electrode, the glass substrate appears yellow, and there is a problem that the quality of PDP color display is reduced. Specifically, there is a problem of displaying white screens with yellow around the silver electrode, reduced brightness of screens showing blue

Method used

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  • Manufacturing method of glass substrate for flat glass
  • Manufacturing method of glass substrate for flat glass
  • Manufacturing method of glass substrate for flat glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0145] use figure 2 The experimental setup is shown. figure 2 is a cross-sectional view of a large tube furnace used in Examples.

[0146] Specifically, a quartz tube 12 is installed in a large-scale tube furnace 11 capable of adjusting the temperature, a glass substrate 13 (10 cm square) for flat glass with a thickness of 2.8 mm is placed in the quartz tube 12, and the large-scale tube furnace 11 is heated to 600 ℃. Among them, "glass substrate for flat glass" is expressed as SiO by mass percentage of oxide standard 2 : 58.6, Al 2 o 3 : 6.9, MgO: 1.9, CaO: 4.8, SrO: 6.9, BaO: 7.9, Na 2 O: 4.0, K 2 O: 6.1, ZrO 2 : 2.8, Fe 2 o 3 : Glass with a composition of 0.09. In addition, the glass transition temperature of the said glass is 600 degreeC.

[0147] Then, the sodium tetraborate decahydrate reagent 15 added to the alumina boat 14 was vaporized by locally heating it to 850° C., and the vaporized substance was sprayed from the end of the quartz tube in the direction...

Embodiment 2

[0151] In addition to making SO 2 The gas injection volume is 0.4L / m 2 Except that, the glass substrate for plate glass with a protective film was manufactured by the method similar to Example 1.

Embodiment 3

[0153] In addition to making SO 2 The gas injection volume is 1.0L / m 2 Except that, the glass substrate for plate glass with a protective film was manufactured by the method similar to Example 1.

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Abstract

An object of the present invention is to provide a method for producing a glass substrate for plate glass capable of maintaining good scratch resistance and preventing color development of Ag colloid, and a glass substrate for plate glass obtained by the production method. The present invention relates to a method for manufacturing a glass substrate for flat glass. The glass substrate for flat glass is manufactured by a float method, and is characterized in that it has a forming step of forming a glass substrate from molten glass on molten tin, and a method of forming a glass substrate by the forming step. The slow cooling process of slowly cooling the glass substrate, and having a first supply process of spraying an inorganic substance containing an alkali metal onto the surface of the glass substrate on the side in contact with the molten tin, and after the first supply process, the A second supply process of blowing SO2 gas to the surface of the glass substrate on the side that is in contact with the molten tin.

Description

technical field [0001] This invention relates to the manufacturing method of the glass substrate for plate glass. Background technique [0002] In recent years, flat panel displays, particularly plasma display panels (hereinafter referred to as "PDPs"), which are a type of thin flat gas discharge display panels, have attracted attention as thin and large flat color display devices. [0003] The PDP is divided into cells by a front glass substrate, a rear glass substrate, and partition walls, and plasma discharges are generated in the cells to make phosphor layers on the inner walls of the cells emit light to form images. [0004] In general, for the front glass substrate and rear glass substrate of a PDP, float glass, which is easy to increase in size of the glass substrate and has excellent flatness and homogeneity, is usually used. . [0005] In addition, a transparent electrode made of ITO (tin oxide doped with indium) is formed on the surface of the glass substrate use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C17/22C03B18/14C03C3/078C03C3/083C03C3/085C03C3/087H01J9/24H01J17/16
CPCH01J2211/34C03C2218/355C03B18/14H01J9/241C03C3/087C03C17/22C03C2217/283C03C2217/28C03C21/007Y02P40/57C03C3/078C03C3/083H01J11/34
Inventor 竹田谕司谷井史朗东诚二秋山良司
Owner ASAHI GLASS CO LTD
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