Large compact zircon overflow brick and manufacturing method thereof

Abstract

A large dense zircon overflow brick, which belongs to the technical field of refractory materials based on zirconia, contains 0.2-1.2% titanium dioxide by weight, and is characterized in that the large dense zircon overflow brick The length is 1500-3100mm, the thickness is 100-600mm, and the width is 600-1000mm. The invention adopts the firing system of molding after vacuuming and slow temperature rise and fall to overcome the phenomenon that the large-scale overflow bricks are easy to crack in the production process, and successfully produces overflow bricks that can be applied to the liquid crystal glass manufacturing system.

Description

technical field [0001] The invention belongs to the technical field of refractory materials based on zirconia, and in particular relates to a large dense zircon overflow brick and a manufacturing method thereof. Background technique [0002] For liquid crystal glass (TFT) substrates, especially products after the fourth generation, the most suitable production method is the overflow vertical down-leading method (also known as the melting method). The two outer surfaces of the liquid crystal glass produced by the overflow method are not in contact with any equipment, so they have extremely high precision, and the outer surface does not need to be polished (see "Glass" (ISSN 1003-1987), Volume 28, Phase 1, 2001) Wen Fu, "The production method of a new generation of substrate glass: overflow vertical down-drawing process"). The Chinese patent publication number CN1486286A discloses the basic technological process of the method, and its content is referred to here. Overflow br...

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Problems solved by technology

This requires the size of overflow bricks to be larger and larger, and large-size overflow bricks are prone to cracking during the production process, especially during molding and firing, the foaming rate is not suitable for control, and the dimensional stability of the finished product is not good. These factors restrict the development of large overflow brick technology

[0006] After searching, no relevant literature was found on the method of making large overflow bricks, especially the method of making overflow bricks with a length greater than 1500mm

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