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Preparation technology of silicon carbide foam ceramic

A preparation process, technology of foam ceramics, applied in the field of foam ceramics, can solve the problems of low production cost, unfavorable industrial production, etc., and achieve the effect of excellent high temperature resistance

Inactive Publication Date: 2016-08-24
任海涛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the melting temperature of silicon carbide materials is as high as more than 2000 degrees, it is not conducive to industrial production, so the addition of sintering aids lowers production costs and saves resources has become a current research hotspot.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The preparation technology of the silicon carbide foamed ceramics of embodiment 1, comprises the following steps:

[0016] S1: Prepare raw materials such as silicon carbide, alumina, kaolin, talcum powder, bentonite, and sodium tripolyphosphate, mix well to obtain a mixed powder, and then place it in a ball mill for ball milling. The weight percentage of each component in the mixed powder is: silicon carbide 80%, alumina 6%, kaolin 7%, talc 1.6%, sodium tripolyphosphate 0.4%, bentonite 5%;

[0017] S2: Pour carboxymethyl cellulose with an amount of 0.5% solid content in S1 into a beaker, add an appropriate amount of distilled water to mix evenly, heat, and weigh 10% solid content in S1 after the carboxymethyl cellulose is completely dissolved The silica sol is poured into the solution to obtain a mixed solution of carboxymethyl cellulose and silica sol;

[0018] S3: Pour the mixed solution into a ball mill jar, and use a planetary mill to mill for 3 hours;

[0019] S4...

Embodiment 2

[0023] The preparation technology of the silicon carbide foamed ceramics of embodiment 2, comprises the following steps:

[0024] S1: Prepare raw materials such as silicon carbide, alumina, kaolin, talcum powder, bentonite, and sodium tripolyphosphate, mix well to obtain a mixed powder, and then place it in a ball mill for ball milling. The weight percentage of each component in the mixed powder is: silicon carbide 76%, alumina 6%, kaolin 12%, talcum powder 2%, sodium tripolyphosphate 1%, bentonite 3%;

[0025] S2: Pour carboxymethyl cellulose with a solid content of 0.6% in S1 into a beaker, add an appropriate amount of distilled water to mix evenly, heat, and weigh 11% of solid content in S1 after the carboxymethyl cellulose is completely dissolved The silica sol is poured into the solution to obtain a mixed solution of carboxymethyl cellulose and silica sol;

[0026] S3: Pour the mixed solution into a ball mill jar, and use a planetary mill to mill for 3 hours;

[0027] S...

Embodiment 3

[0031] The preparation technology of the silicon carbide foam ceramics of embodiment 3, comprises the following steps:

[0032] S1: Prepare raw materials such as silicon carbide, alumina, kaolin, talcum powder, bentonite, and sodium tripolyphosphate, mix well to obtain a mixed powder, and then place it in a ball mill for ball milling. The weight percentage of each component in the mixed powder is: silicon carbide 76.5%, alumina 4%, kaolin 10%, talc 2%, sodium tripolyphosphate 2%, bentonite 5.5%;

[0033] S2: Pour carboxymethyl cellulose with an amount of 0.7% solid content in S1 into a beaker, add an appropriate amount of distilled water to mix evenly, heat, and weigh 12% solid content in S1 after the carboxymethyl cellulose is completely dissolved The silica sol is poured into the solution to obtain a mixed solution of carboxymethyl cellulose and silica sol;

[0034] S3: Pour the mixed solution into a ball mill jar, and use a planetary mill to mill for 3 hours;

[0035] S4:...

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PUM

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Abstract

The invention discloses a preparation technology of silicon carbide foam ceramic. The preparation technology comprises the steps of raw material preparation, mixed solution preparation, ball milling, modifying firing and the like. The silicon carbide foam ceramic is prepared by an organic foam impregnation technology, MgO-Al2O3-SiO2 is introduced as a sintering aid system, and the main crystal phases of the silicon carbide foam include mullite, cordierite, cristobalite and alpha-silicon carbide. The silicon carbide foam ceramic prepared by the system has the strength up to 1.23MPa as well as excellent high-temperature resistance and is applicable to molten iron filtration.

Description

technical field [0001] The invention relates to the field of foam ceramics, in particular to a preparation process of silicon carbide foam ceramics. Background technique [0002] As a new type of ceramic material with many excellent properties, ceramic foam is the third generation of ceramic products developed after porous ceramics and honeycomb ceramics. Silicon carbide foam ceramics combines the excellent characteristics of silicon carbide materials and foam ceramics. Compared with other materials of foam ceramics, it has the characteristics of high temperature strength, wear resistance, oxidation resistance, corrosion resistance, and thermal shock resistance. At present, silicon carbide foam ceramics are mainly used in the filtration of molten metal, and are widely used in the cast iron industry. They can effectively filter large inclusions in molten iron and even a large part of tiny suspended inclusions as small as tens of microns, thus significantly Reduce casting rej...

Claims

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Application Information

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IPC IPC(8): C04B35/565C04B38/06
Inventor 任海涛
Owner 任海涛
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