High-purity zirconium oxide refractory product with gradient function and preparation method thereof

A technology of refractory products and gradient functions, applied in the field of refractory materials, can solve problems such as expansion/contraction deformation mismatch, uneven temperature field distribution, and reduced service life of zirconia products, and achieve low input costs, high use temperature, and improved use. The effect of longevity
CN103553653AActive Publication Date: 2014-02-05SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
Publication Date
2014-02-05

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Abstract

Belonging to the field of refractory materials, the invention mainly relates to a high-purity zirconium oxide refractory product with gradient function and a preparation method thereof. The product contains no less than 98 wt% of ZrO2 containing a stabilizer; and a forming method of a blank for the zirconium oxide refractory product is isostatic pressing, machine pressure or vibration pressing ramming molding. The zirconium oxide refractory product is characterized in that the blank of the zirconium oxide refractory product is in an overall cylindrical structure formed by a plurality of spliced arc plates; and the refractory product has specific inhomogeneous internal microstructure. The zirconium oxide refractory product provided by the invention has the characteristics of high working temperature, high chemical purity and gradient changes in porosity, volume density, linear expansion coefficient and thermal conductivity along a specific direction, and can significantly prolong the service life of the zirconium oxide product in an ultra high temperature environment.
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Description

technical field

[0001] The invention belongs to the field of refractory materials, and mainly relates to a high-purity zirconia refractory product with gradient function and a preparation method. Background technique

[0002] Zirconia is an important refractory raw material with a melting point as high as 2715°C and excellent physical and chemical properties. In order to improve the performance of many refractories, a certain amount of zirconia is added, such as fused AZS bricks, Al 2 o 3 -ZrO 2 -C brick, Cr 2 o 3 -Al 2 o 3 -ZrO 2 bricks etc.

[0003] High-purity zirconia refractory products usually refer to refractory products with a zirconia (including stabilizer) content of more than 98%. It uses zirconia particles or zirconia hollow spheres, zirconia fine powder, stabilizers, binders, etc. as raw materials. The refractory products of the desired shape are prepared by casting, pouring, machine pressing, isostatic pressing, ramming and other molding methods. Comp...

Claims

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