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Aluminum silicon carbide and silicon carbide composite material and preparation method thereof

A technology of aluminum silicide and composite materials, applied in the field of composite refractory materials, can solve the problems of high cost and difficult industrialization, and achieve the effects of excellent performance, prolonged service life, and abundant raw material resources.

Inactive Publication Date: 2009-05-06
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, Al is synthesized at home and abroad 4 SiC 4 The main method of material is metal Al powder, Si powder and C powder or Al, SiC and C powder or Al 4 C 3 It is produced by reacting with SiC powder at a high temperature of 1600-1800°C, but the corresponding cost is relatively high, and it is difficult to realize the industrialization of production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A kind of aluminum carbon silicide and silicon carbide composite material and its preparation method, first mix 35-40wt% of clay, 30-35wt% of industrial carbon powder and 30-35wt% of metal aluminum powder, and add 5-8wt% of the above mixture Calcium lignosulfonate, calcium lignosulfonate is first dissolved into an aqueous solution and then used as ingredients, stirred for 5-15 minutes, pressed into shape, dried at 90-110°C for 12-24 hours; then in an argon atmosphere and sintering under the condition of 1600-1700° C. for 5-6 hours, and cooling naturally to prepare aluminum carbide silicon carbide and silicon carbide composite materials.

[0013] The content and particle size of the mixture in this embodiment 1 are: the SiO of clay 2 Al content ≥ 40wt%, particle size 0.1-0mm; metal aluminum powder Al content ≥ 90wt%, particle size 0.1-0mm; industrial carbon powder C content ≥ 80wt%, particle size 0.1-0mm.

Embodiment 2

[0015] An aluminum carbon silicide and silicon carbide composite material and a preparation method thereof. First mix 40-45wt% clay, 20-25wt% industrial carbon powder and 30-35wt% metal aluminum powder, add 6-7wt% sodium lignosulfonate of the above mixture, and dissolve the sodium lignosulfonate first The aqueous solution is then used for batching, stirred for 10-15 minutes, pressed into shape, dried at 80-110°C for 18-30 hours; then sintered under argon atmosphere and at 1700-1800°C for 3-4 hours , Aluminum carbide silicon carbide and silicon carbide composite materials were obtained after natural cooling.

[0016] The content and particle size of the mixture in this embodiment 2 are the same as in embodiment 1.

Embodiment 3

[0018] A composite material of aluminum carbon silicide and silicon carbide and its preparation method: first mix 45-50 wt% of clay, 20-25 wt% of industrial carbon powder and 25-30 wt% of metal aluminum powder, and add 3-6 wt% of the above mixture Sulfurous acid pulp waste liquid, stirred for 5-15 minutes, pressed into shape, dried at 60-90°C for 24-36 hours; then sintered under argon atmosphere and at 1750-1800°C for 2-3 hours , Aluminum carbide silicon carbide and silicon carbide composite materials were obtained after natural cooling.

[0019] The content and the particle size of the mixture in the present embodiment 3 are the same as in the embodiment 1.

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PUM

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Abstract

The invention relates to a composite material of Al4SiC4 and SiC and a method for preparing the same. The technical proposal adopted by the invention is as follows: firstly, 35 to 55 weight percent of clay, 20 to 40 weight percent of industrial carbon powder and 25 to 40 weight percent of metallic aluminium powder are mixed; and the mixture is added with 3 to 10 weight percent of bonding agent to be stirred for 5 to 25 minutes, is pressed to be shaped, and is dried for 12 to 36 hours under the condition of between 60 and 110 DEG C or naturally dried for 24 to 48 hours indoors; and secondly, the mixture is sintered for 2 to 6 hours under argon atmosphere and under the condition of between 1,600 and 1,800 DEG C, and is cooled naturally to obtain the composite material of the Al4SiC4 and the SiC. The composite material has the advantages of rich raw material resource, low production cost, excellent performance and so on, is used for a novel furnace lining material for nonferrous metal and iron and steel smelting equipment, particularly suitable for producing ladle inside lining and refining furnace lining of clean steel such as low carbon steel, ultra-low carbon steel and so on and is favorable for improving the quality of steel.

Description

technical field [0001] The invention belongs to the field of composite refractory materials, in particular to an aluminum carbon silicide and silicon carbide composite material and a preparation method thereof. Background technique [0002] Aluminum carbon silicide and silicon carbide composite materials have excellent high temperature resistance and thermal stability, and are raw materials for the production of new lining materials for non-ferrous metal and iron and steel smelting equipment, especially for the production of clean steel such as low carbon steel and ultra-low carbon steel The ladle lining and refining furnace lining can replace alumina-carbon and high alumina-carbon composite refractory materials, which is conducive to improving the quality of steel and has a good use effect. [0003] Aluminum carbide silicide (Al 4 SiC 4 ) has a high melting point (about 2037°C), high strength, high chemical stability, low thermal expansion coefficient, and excellent oxida...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/56
Inventor 邓承继祝洪喜白晨
Owner WUHAN UNIV OF SCI & TECH
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