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Low temperature method for manufacturing high thermal shock superhigh temperature zircite product

A manufacturing method and technology of zirconia, which is applied in the field of low-temperature manufacturing of high thermal shock zirconia products, can solve the problems of poor thermal shock stability, good heat insulation effect, and low thermal expansion rate, and achieve high thermal shock stability and heat insulation Good effect, good high temperature stability

Active Publication Date: 2009-08-12
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to achieve the strategic goals of energy saving, emission reduction and cost saving advocated by the state, and to overcome the problems of poor thermal shock stability of existing zirconia products, easy cracking, peeling and damage during use, the present invention proposes a low-temperature synthesis with good thermal shock resistance. High-strength, low-temperature manufacturing method of high-purity zirconia products that can be used in ultra-high temperature environments for a long time, so that the zirconia products manufactured by this method have high melting point, high temperature stability, high thermal shock stability, high compressive strength, and thermal expansion. It has the advantages of low efficiency, no infiltration with most high-temperature melts and good heat insulation effect, and can be used in ultra-high temperature environments above 2200 ° C for a long time

Method used

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Embodiment 1

[0023] Embodiment 1: Adopt the production technique and technical scheme described in the present invention, its aggregate is to be made up of the fused zirconia particle of 0~3mm with CaO as stabilizer, and the total content of stabilizer CaO in aggregate is 3.69% , the total content of zirconia particles in the product is 62%; its matrix is ​​made of (CaO+Y 2 o 3 ) as composite stabilizer and fused zirconia fine powder with particle size 2 o 3 ) in the matrix has a total content of 3.70%, and the total content of zirconia fine powder in the product is 38%; Y with a particle size of 99.9% 2 o 3 Fine powder is used as an additive, and the added additive is 0.6% of the total weight of the product, and ZrO in the product 2 +CaO+Y 2 o 3 The total content is greater than 99.20% to ZrOCl 2 The solution is used as a binder, and the additional binder is 2.0% of the total weight of the product. After kneading, molding, and drying, it is fired at a temperature of 1680°C. Compara...

Embodiment 2

[0030] Embodiment 2: Adopting the production process and technical scheme of the present invention, the aggregate is composed of 0-3mm fused zirconia particles with CaO as the stabilizer, and the total content of the stabilizer CaO in the aggregate is 3.69% , the total content of zirconia particles in the product is 62%; its matrix is ​​composed of (MgO+Y 2 o 3 ) as composite stabilizer and fused zirconia fine powder with particle size 2 o3 ) in the matrix with a total content of 4.00%, and the total content of zirconia fine powder in the product is 38%; Y with a particle size of 99.9% 2 o 3 Fine powder is used as an additive, and the added additive accounts for 0.4% of the total weight of the product, and the ZrO in the product 2 +CaO+MgO+Y 2 o 3 The total content is greater than 99.20% to ZrO 2 The sol is used as a binder, and the additional binder accounts for 2.5% of the weight of the product. After kneading, molding, and drying, it is fired at a temperature of 1680°C...

Embodiment 3

[0037] Embodiment 3: Adopting the production process and technical scheme of the present invention, the aggregate is composed of 0-3mm fused zirconia particles with CaO as the stabilizer, and the total content of the stabilizer CaO in the aggregate is 3.69% , the total content of zirconia particles in the product is 62%; its matrix is ​​composed of Y 2 o 3 Used as a stabilizer and composed of fused zirconia fine powder with a particle size 2 o 3 The total content in the matrix is ​​5.2%, and the total content of zirconia fine powder in the product is 38%; Y 2 o 3 Fine powder is used as an additive, and the added additive accounts for 0.4% of the total weight of the product, and the ZrO in the product 2 +CaO+Y 2 o 3 The total content is greater than 99.40% to phenolic resin and ZrOCl 2 The composite solution is used as a binder, and the additional binder accounts for 2.0% of the total weight of the product. After kneading, molding, and drying, it is fired at a temperature...

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Abstract

The invention discloses a method for manufacturing a high thermal shock ultra-temperature zirconium dioxide product at low temperature. The manufacturing method is to use electric-melting high-purity zirconium dioxide fine powder with granularity less than 47mum (using one of Y2O3, (CaO+Y2O3), (CaO+MgO) and (MgO+Y2O3) as a stabilizing agent) as a substrate, Y2O3 fine powder with granularity less than 5mum as an additive, one of ZrO2 collosol and ZrOCl solution or combination of one of lignosulphonate and phenolic resin with the ZrOCl solution as a bonding agent to fire the product after milling, forming and drying at a temperature ranging from 1,630 to 1,700 DEG C. Heavy and light high purity zirconium dioxide products which are manufactured by the method have high thermal shock stability, high compressive strength, good high temperature stability, strong impermeability and erosion resistance, good thermal insulation effect and the like, and can be used in a high temperature environment over 2,200 DEG C for long time; and the manufacturing method has the advantages of simple manufacturing process, easy industrial popularization and application and the like.

Description

technical field [0001] The invention relates to a low-temperature manufacturing method for ultra-high-temperature smelting and ultra-high-temperature firing of special metals and high thermal shock zirconia products for ultra-fine metal powder manufacturing. Background technique [0002] Most of the zirconia refractory materials currently used are produced by the traditional production process, that is, using electrofusion-stabilized zirconia sand and electrofusion-stabilized zirconia fine powder as raw materials to burn heavy zirconia refractories at high temperatures, or electrofusion-stabilized Zirconia hollow spheres and fused stabilized zirconia fine powder are used as raw materials. After being formed by vibration and pressure, they are fired at a high temperature of 1800°C to produce heat-insulating lightweight zirconia hollow sphere products. However, the zirconia hollow spheres and zirconia sand particles are mostly bonded at points, and it is difficult to form a hi...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/482C04B35/622C04B35/64
Inventor 谭清华耿可明吴爱军朱德先张涛胡飘王晗张亚栋石鹏坤
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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