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High-temperature creep-resistant ceramic material and preparation method thereof

A technology of creep resistance and ceramic materials, which is applied in the field of high-temperature ceramic materials, can solve problems such as poor high-temperature creep resistance, poor corrosion resistance, and easy fracture, and achieve improved bridge support, increased powder bulk density, and reduced sintering The effect of temperature

Active Publication Date: 2022-01-04
SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a high-temperature creep-resistant ceramic material and its preparation method to solve the problem of poor high-temperature creep resistance and high-temperature resistance of ceramic materials prepared in the prior art. Poor corrosion, easy to break, short life, etc.

Method used

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  • High-temperature creep-resistant ceramic material and preparation method thereof

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preparation example Construction

[0030] The invention provides a method for preparing a high-temperature creep-resistant ceramic material, comprising the following steps:

[0031] S1. In parts by weight, weigh 50-90 parts of high-purity α-Al 2 o 3 powder, 25-50 parts of tabular corundum powder, 1-3 parts of zirconia powder and 0.5-1 part of sintering aid, put them into a ball mill, use water as a solvent, add a water-soluble dispersant, grind and mix, and set the ball milling time It takes 15-24 hours to obtain a ceramic slurry with high solid content, good fluidity and uniform suspension; wherein, the pH value of the ceramic slurry is preferably slightly alkaline, for example, the pH value is 8-10.

[0032] S2. After sieving the ceramic slurry obtained in S1, vacuum defoaming, put it into a ceramic slurry bucket, add a catalyst and an initiator, after stirring evenly, inject the evenly stirred slurry into a mold, and demould after curing, to obtain ceramic body;

[0033] S3, drying the ceramic green body ...

Embodiment 1

[0045] This embodiment provides a method for preparing a high-temperature creep-resistant ceramic material, comprising the following steps:

[0046] S1. In parts by weight, weigh 50 parts of high-purity α-Al 2 o 3 powder, 48.5 parts of tabular corundum powder, 1 part of zirconia powder and 0.5 part of sintering aid, put them into a ball mill, use water as a solvent, add a water-soluble dispersant, grind and mix, and set the ball milling time to 15h to obtain a high-solid A ceramic slurry with uniform phase content, good fluidity and uniform suspension; wherein, the pH value of the ceramic slurry is preferably slightly alkaline, for example, the pH value is 8.

[0047] S2. After sieving the ceramic slurry obtained in S1, vacuum defoaming, put it into a ceramic slurry bucket, add a catalyst and an initiator, after stirring evenly, inject the evenly stirred slurry into a mold, and demould after curing, to obtain ceramic body;

[0048] S3, drying the ceramic green body obtained...

Embodiment 2

[0060] This embodiment provides a method for preparing a high-temperature creep-resistant ceramic material, comprising the following steps:

[0061] S1. In parts by weight, weigh 65 parts of high-purity α-Al 2 o 3 powder, 33.5 parts of platy corundum powder, 1.5 parts of zirconia powder and 0.65 parts of sintering aid, put them into a ball mill, use water as solvent, add water-soluble dispersant, grind and mix, set the ball milling time to 18h, and get high solid A ceramic slurry with uniform phase content, good fluidity and uniform suspension; wherein, the pH value of the ceramic slurry is preferably slightly alkaline, for example, the pH value is 9.

[0062] S2. After sieving the ceramic slurry obtained in S1, vacuum defoaming, put it into a ceramic slurry bucket, add a catalyst and an initiator, after stirring evenly, inject the evenly stirred slurry into a mold, and demould after curing, to obtain ceramic body;

[0063] S3, drying the ceramic green body obtained in S2, ...

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Abstract

The invention provides a preparation method of a high-temperature creep-resistant ceramic material, which comprises the following steps: S1, weighing 50-90 parts by weight of high-purity alpha-Al2O3 powder, 25-50 parts by weight of tabular corundum powder, 1-3 parts by weight of zirconium oxide powder and 0.5-1 part by weight of sintering aid, taking water as a solvent, adding a water-soluble dispersant, and carrying out ball milling to obtain slurry; s2, carrying out vacuum defoaming on the slurry, adding a catalyst and an initiator, uniformly stirring, injecting into a mold, curing, and demolding to obtain a green body; s3, drying the green body, softening, cutting into green sheets, and drying; and S4, sintering the dried blank sheet to obtain the ceramic material. The bulk density of the powder of the raw material components in different parts by weight is high, and the prepared ceramic material is a high-density material with high density and high hardness; and through mutual cooperation and distribution of the raw material components, bridge support of tabular corundum in a material system, and phase change toughening of alpha-Al2O3 and zirconium oxide in a high-temperature stage, and the prepared ceramic material has improved high-temperature creep resistance, breaking strength and erosion resistance, and is not easy to break and long in service life.

Description

technical field [0001] The invention relates to the technical field of high-temperature ceramic materials, in particular to a high-temperature creep-resistant ceramic material and a preparation method thereof. Background technique [0002] In recent decades, with the rapid development of high-temperature technology, the demand for high-temperature creep-resistant ceramic materials in metallurgy, chemical industry, power, machinery manufacturing, and glass fiber manufacturing has increased dramatically, and high-temperature creep-resistant ceramic materials have gradually occupied an important position. With the promotion and use of new glass fiber technology, large-scale, continuous and high-efficiency advanced equipment is gradually put into production. These advanced equipment make the working conditions of high-temperature creep-resistant ceramic materials worse. Therefore, in actual industrial production, such ceramic materials The requirements for mechanical strength, c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/119C04B35/622C04B35/64
CPCC04B35/119C04B35/622C04B35/64C04B2235/5445C04B2235/5436C04B2235/5427C04B2235/96C04B2235/9669C04B2235/3225C04B2235/3206C04B2235/3227C04B2235/6562C04B2235/6567
Inventor 徐先豹张永翠于宏林王伟伟王营营隋松林崔凯
Owner SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS
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