Al4SiC4/SiC composite refractory materials and preparation method thereof

A technology of refractory materials and binders, which is applied in the field of composite refractory materials, can solve problems such as high cost and difficulty in industrialization, and achieve the effects of excellent performance, extended 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 formed by reacting with SiC powder at a high temperature of 1600-1700°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

[0011] a kind of Al 4 SiC 4 / SiC composite refractory material and preparation method thereof, first 50~55wt% SiO 2 Mix clay with a content ≥ 40 wt% and a particle size of 0.1-0mm, 45-50 wt% of C content ≥ 80% and industrial carbon powder with a particle size of 0.1-0mm, add 3-7 wt% of the above-mentioned binder, and stir for 10 ~20 minutes, press molding, drying at 60-110°C for 12-24 hours; then sintering and synthesizing at 1600-1700°C for 5-6 hours under an argon atmosphere. Al was produced after natural cooling 4 SiC 4 / SiC composites.

[0012] Wherein: the binding agent is a mixture of calcium lignosulfonate and sodium lignosulfonate, which is first dissolved into an aqueous solution and then used for batching.

Embodiment 2

[0014] a kind of Al 4 SiC 4 / SiC composite refractory material and its preparation method, except that the binder is industrial dextrin powder, all the other are the same as in Example 1.

Embodiment 3

[0016] a kind of Al 4 SiC 4 / SiC composite material and preparation method thereof, first 55~60wt% SiO 2 Mix clay with content ≥ 40wt% and particle size 0.1-0mm, 40-45wt% C content ≥ 80wt% and industrial carbon powder with particle size 0.1-0mm, add 3-7wt% phenolic resin to the above mixture, stir and mix 5-20 minutes, press molding, drying at 60-110°C for 12-36 hours; then sintering in an argon atmosphere and at 1650-1750°C for 4-5 hours, and naturally cooling to produce Al 4 SiC 4 / SiC composites.

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Abstract

The invention relates to a composite refractory material of Al4SiC4 and SiC and a method for preparing the same. The technical proposal is as follows: firstly, 50 to 65 weight percent of clay and 35 to 50 weight percent of industrial carbon 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 refractory material has the characteristics of rich raw material resource, low production cost and easy industrialized production. The composite refractory material of the Al4SiC4 and the SiC prepared by the method not only has excellent performance, but also can prolong the service life, is suitable 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 technical field of composite refractories. Especially involving an Al 4 SiC 4 / SiC composite material and its preparation method. Background technique [0002] al 4 SiC 4 / SiC composite material has excellent high temperature resistance and thermal stability, and is the raw material for the preparation of new furnace lining materials for non-ferrous metals and iron and steel smelting equipment, especially for ladle linings and ladle linings for clean steel such as low carbon steel and ultra-low carbon steel. Refining furnace lining, replacing alumina-carbon and high-alumina-carbon composite refractory materials, 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 oxidation resistance and hydration resistance. It is a hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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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