Method for manufacturing zirconium oxide product

A manufacturing method and technology of zirconia, applied in the direction of manufacturing tools, glass manufacturing equipment, glass furnace equipment, etc., to achieve the effects of energy saving, easy process control, and accurate furnace lining size

Active Publication Date: 2010-10-13
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to overcome the shortcomings of the above-mentioned existing production methods and provide a manufacturing method with advanced technology, low energy consumption, good product performance and easy industrial production, so that the zirconia products produced by the method of the present invention Used on fused silica melting furnace, no expansion, peeling, crushing and crushing phenomenon, less bonding with fused silica melt and easy peeling, no pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: The product sample is prepared according to the technical scheme of the present invention, and the partially stabilized desiliconized zirconium hollow spheres with a CaO content of 3.4 wt%, a ball diameter of 2 to 0.2 mm, and 43% of the total sample weight are used, and the CaO content is 3.4 Part of the stabilized fused zirconia particles with a particle size of 1-0.1mm and 17% of the total weight of the sample are aggregates, and the part with a CaO content of 3.4wt%, a particle size of 2 Ultrafine powder is used as the matrix, and 5.2wt% calcium lignosulfonate solution is added as the binder. After kneading, molding, and drying, it is fired at 1680 ° C. The ZrO in the product 2 +HfO 2 The combined amount of +CaO is 99.2wt%. Comparative Example 1 uses fully stabilized zirconia hollow spheres with a CaO content of 4.5%, fully stabilized fused zirconia particles and fine powder as raw materials, introduces a sintering aid, and uses lignin sulfonate Calcium...

Embodiment 2

[0025] Embodiment 2: The product sample is prepared according to the technical scheme of the present invention, and the partially stabilized desiliconized zirconium hollow spheres with a CaO content of 2.8 wt%, a ball diameter of 2 to 0.2 mm, and 45% of the total sample weight are adopted, and the CaO content is 2.8 Part of the stabilized fused zirconia particles with a particle size of 1-0.1mm and 15% of the total weight of the sample are aggregates, and the part with a CaO content of 2.8wt% and a particle size of 2 Ultrafine powder is used as the matrix, and 4.9wt% polyvinyl alcohol solution is added as the binder. After kneading, molding, and drying, it is fired at 1720 ° C. The ZrO in the product 2 +HfO 2The combined amount of +CaO is 99.12wt%. Comparative Example 2 uses fully stabilized zirconia hollow spheres with a CaO content of 4.5%, fully stabilized fused zirconia particles and fine powder as raw materials, introduces a sintering aid, and uses lignin sulfonate Calciu...

Embodiment 3

[0029] Embodiment 3: The product sample is prepared according to the technical scheme of the present invention, and the partially stabilized desiliconized zirconium hollow spheres with a CaO content of 3.6 wt%, a ball diameter of 1.5 to 0.2 mm, and 48% of the total weight of the sample are used, and the CaO content is 3.6 Part of the stabilized fused zirconia particles with a particle size of 1-0.1mm and 12% of the total weight of the sample are aggregates, and the part with a CaO content of 3.6wt% and a particle size of 2 Ultrafine powder is used as the matrix, and 3.5wt% methylcellulose solution is added as the binder. After kneading, molding, and drying, it is fired at 1640 ° C. The ZrO in the product 2 +HfO 2 The combined amount of +CaO is 99.05wt%. Comparative Example 3 uses fully stabilized zirconia hollow spheres with a CaO content of 4.5%, fully stabilized fused zirconia particles and fine powder as raw materials, introduces a sintering aid, and uses lignin sulfonate C...

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Abstract

The invention relates to a production method of the zirconia, which adopts the zirconia hollow sphere or desilicated zirconia hollow sphere, zirconia granule by electric smelting, desilicated zirconia granule by electric smelting or the mixture of the zirconia granule by electric smelting and the desilicated zirconia granule by electric smelting as the aggregates and the zirconia powder by electric smelting or desilicated zirconia by electric smelting or the mixture of the zirconia powder by electric smelting and the desilicated zirconia by electric smelting and the submicron powder of the active and monoclinic ZrO2 as the matrixes, and is added with bonding agent to prepare the zirconia product baked below the temperature of 1600 DEG C. to 1720 DEG C. with low expansion ratio and high intensity after mixing, molding and drying. The zirconia product produced by the technology also brings the positive effects of low firing temperature, low energy consumption, long service life of firing equipment, low production cost, easy industrialization, popularization and application. The product is used on the fused quartz smelting furnace operated at about 2000 DEG C. and has the good effects of having no expansion drop, having less bonding and easy stripping with the fused quartz flux and having no pollution.

Description

technical field [0001] The invention relates to a method for manufacturing zirconia products, in particular to a method for producing zirconia products with low thermal expansion rate and high strength by controlling the amount of stabilizer added and the amount of activated zirconia ultrafine powder introduced. It is mainly used for the lining of melting furnaces for the production of ultra-high purity fused silica glass. Background technique [0002] ZrO 2 The melting point is as high as 2690°C. It is a high-grade refractory material with high refractory performance, good chemical stability, and unique advantages of being stable under oxidation, reduction and vacuum conditions. It is often used in environments with operating temperatures of 2000°C or higher. At present, the zirconia products used in fused silica melting furnaces and tungsten-molybdenum superhard alloy intermediate frequency induction furnaces have not been replaced by any materials. [0003] Since zircon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/482C03B5/43
CPCC03B5/43
Inventor 吴爱军陈人品朱德先张亚栋张涛谭清华胡飘燕君杰
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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