Large compact zircon overflow brick and manufacturing method thereof

A zircon and overflow brick technology, applied in the field of refractory materials, can solve the problems of poor dimensional stability of finished products, restricting the development of large overflow bricks, and not finding large overflow bricks, etc. High purity of ingredients and good thermal shock resistance

Active Publication Date: 2007-09-12
ZIBO GT INDAL CERAMICS
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-14

[0044] Examples 1-14 The large dense zircon overflow bricks of the present invention were prepared according to the following steps.

[0045] 1) Batching: batching according to the batching ratio shown in Table 2; wherein the finely ground zircon powder used has a particle size of 2-20 μ, and the zircon aggregate has a particle size of 0.1-1 mm;

[0046] 2) Wet fine grinding: put the ingredients into a ball mill for ball milling and mixing;

[0047] 3) Spray granulation: the slurry obtained by the ball mill is sprayed and granulated by a spray granulator according to a conventional method in the art;

[0048] 4) Install the rubber model: fill the granulated material into the rubber mold, and vacuumize according to the parameters in Table 3. The vacuum degree of the present invention is greater than 0.01MPa; the preferred vacuum degree is 0.06-0.08MPa.

[0049] 5) Isostatic pressing: See Table 3 for pressure parameters. The present invention is formed in a large-scale isostati...

Embodiment 14

[0056] All of Example 14 uses finely ground zircon powder. Correspondingly, the step of installing the rubber model must adopt a higher degree of vacuum, for example, the degree of vacuum is 0.09MPa, and the firing curve should adopt the lower limit of temperature rise and fall, such as curve a.

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Abstract

This invention relates to a large densed zircon overflow bricks containing TiO2 weighting 0.2-1.2% characterizing that the large densed zircon overflow brick is 1500-3100mm long, 100-600mm thick and 600-1000mm wide, which applies vacuumization first and molding later and rising and lowering the temperature slowly thus to overcome crack during the process of producing said bricks and produce overflow bricks used in the production system of liquid crystal glasses.

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 cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/49C04B35/64C04B35/626C04B35/622
Inventor 张启山张瑛李宇平李玉强蒋绪贵冯延春
Owner ZIBO GT INDAL CERAMICS
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