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Production method of aluminum silicon sol reinforced silicon carbide kiln furniture

A silica-alumina sol and silicon carbide kiln technology, which is applied in the field of refractory preparation to achieve the effects of promoting molding and sintering, improving oxidation resistance, and improving mechanical properties

Active Publication Date: 2016-03-09
ANJI KELING MAGNETIC MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of colloidal nanoparticles to toughen SiC ceramics has not been reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1, a kind of production method of silica-alumina sol reinforced silicon carbide kiln furniture, take the silicon carbide particle that particle diameter is 1~2mm as matrix, with the silica sol that solid phase mass content is 50% and solid phase mass content is 20% of the alumina sol is used as a binder; the mass of the silica sol is 0.15% of the mass of the silicon carbide matrix, and the mass of the alumina sol is 0.92% of the mass of the silicon carbide matrix; the process steps are as follows:

[0016] 1) wet-mixing silicon carbide particles and silica-alumina sol (ie, silica sol and alumina sol) in a mixer for 1 hour according to the above ratio to obtain a mixture;

[0017] 2) After the mixture is trapped for 24 hours, it is molded, and the molding pressure is 120MPa. Then the molded samples were dried at 40°C for 12 hours, and then fired at 1450°C for 4 days (96h) to obtain silica-alumina sol reinforced silicon carbide kiln furniture (hereinafter refer...

Embodiment 2

[0019] Embodiment 2, a kind of production method of silica-alumina sol reinforced silicon carbide kiln furniture, the size is 1~2mm silicon carbide particle is matrix, with the silica sol that solid phase mass content is 60% and solid phase mass content is 35% % of the alumina sol is the binder; the quality of the silica sol is 0.31% of the mass of the silicon carbide matrix, and the quality of the alumina sol is 1.70% of the mass of the silicon carbide matrix; the process steps are as follows:

[0020] 1), according to the above ratio, wet-mix the silicon carbide particles and the silica-alumina sol in a mixer for 2 hours to obtain a mixture;

[0021] 2), after the mixture is trapped for 24 hours, it is molded (the shape and size are the same as in Example 1), and the molding pressure is 160MPa. Then the molded sample was dried at 60°C for 12 hours, and then fired at 1600°C for 3 days (72h) to obtain a product.

[0022] The specific size of the product is 5 cm x 5 cm x 20 cm...

Embodiment 3

[0023] Embodiment 3, a kind of production method of silicon carbide kiln furniture reinforced by silica-alumina sol, the silicon carbide particles with a size of 1-2mm are used as the substrate, the silica sol with a solid phase mass content of 40% and a solid phase mass content of 10% % of the alumina sol is the binder; the quality of the silica sol is 0.46% of the mass of the silicon carbide matrix, and the quality of the alumina sol is 2.60% of the mass of the silicon carbide matrix; the process steps are as follows:

[0024] 1), according to the above ratio, wet-mix the silicon carbide particles and the silica-alumina sol in a mixer for 1.5 hours to obtain a mixture;

[0025] 2), after the mixture is trapped for 24 hours, it is molded (the shape and size are the same as in Example 1), and the molding pressure is 140MPa. Then the molded sample was dried at 50°C for 12 hours, and then fired at 1500°C for 3 days to obtain a product.

[0026] The specific size of the product ...

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Abstract

The invention discloses a production method of aluminum silicon sol reinforced silicon carbide kiln furniture. With silicon carbide particles as a matrix as well as silicon dioxide sol and aluminium oxide sol as binding agents, the production method of the aluminum silicon sol reinforced silicon carbide kiln furniture sequentially comprises the following steps: 1) uniformly mixing the silicon carbide particles, silicon dioxide sol and aluminium oxide sol to obtain mixture, wherein the solid mass content of the silicon dioxide sol is 30-70%, and the solid mass content of the aluminum oxide sol is 10-40%; 2) ageing the mixture for 22-26 hours, and then moulding, wherein the moulding pressure is 120-160MPa; and then drying a product obtained through moulding for 10-14 hours in an environment at the temperature of 40-60 DEG C, and then firing for 72-96 hours at the temperature of 1450-1700 DEG C, so that the aluminum silicon sol reinforced silicon carbide kiln furniture is obtained.

Description

technical field [0001] The invention relates to a method for preparing a refractory material, in particular to a method for producing silicon carbide kiln furniture reinforced by silica-alumina sol. Background technique [0002] Kiln furniture refers to the utensils made of refractory materials to support, isolate and protect the products during the high temperature process, including saggers, push plates, shed plates, etc. The performance of kiln furniture has an important impact on the final performance of the product. Considering the working environment of high-temperature kiln furniture and other issues, qualified kiln furniture must meet the following conditions: good high-temperature mechanical properties, chemical stability at high temperatures, fire resistance and thermal shock resistance. The kiln furniture used in modern industry is generally synthetic material ceramic kiln furniture, usually with SiC, mullite, corundum, cordierite and other refractory materials. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/63C04B35/565C04B35/66
CPCC04B35/565C04B35/6303C04B35/66C04B2235/3218C04B2235/3418C04B2235/5427C04B2235/80
Inventor 郭兴忠刘大明宋杰徐生富杨辉
Owner ANJI KELING MAGNETIC MATERIAL
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