Al4O4C enhanced silicon carbide honeycomb ceramic and preparation method thereof

Abstract

The invention discloses Al4O4C enhanced silicon carbide honeycomb ceramic and a preparation method thereof. The Al4O4C enhanced silicon carbide honeycomb ceramic is prepared from raw material ingredients in parts by mass: 75 to 85 parts of first silicon carbide powder, 5 to 15 parts of second silicon carbide powder, 5 to 10 parts of Al4O4C, 2 to 6 parts of sintering aid, 12.5 to 22.5 parts of binding agent and 12.5 to 22.5 parts of water, wherein the purity of the first silicon carbide powder is 85 to 99.9wt%, the granularity of the first silicon carbide is 5 to 50mu m, the purity of the second silicon carbide is 85 to 99.9wt%, and the granularity of the second silicon carbide is 0.05 to 0.5mu m. The Al4O4C enhanced silicon carbide honeycomb ceramic disclosed by the invention has the characteristics of high raw material utilization rate and high production efficiency; furthermore, a product structure is in a wall flow type, so that purifying capacity to waste gas is improved; the product is easy to form, and a process is easy to control; the Al4O4C enhanced silicon carbide honeycomb ceramic prepared by the method has the advantages of good microstructure, even micropore distribution, high mechanical strength and low thermal expansion coefficient.

Description

Technical field [0001] The present invention relates to an Al 4 O 4 C-reinforced silicon carbide honeycomb ceramics and a preparation method thereof belong to the technical field of honeycomb ceramics. Background technique [0002] Developed countries began to control vehicle exhaust in the 1970s and formulated emission standards. In order to reduce the hazards of exhaust pollutants from gasoline and diesel vehicles, honeycomb ceramic filters are mainly used. With the economic construction and the continuous increase in the exhaust emissions of gasoline and diesel vehicles used by residents, my country's environmental protection requirements are gradually increasing, and higher emission reduction technologies are needed. [0003] The wall-flow silicon carbide honeycomb ceramic obtained by the current preparation method of the wall-flow silicon carbide honeycomb ceramic has high thermal expansion coefficient, high firing temperature, uneven size and distribution of micropores in th...

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Problems solved by technology

[0003] The wall-flow silicon carbide honeycomb ceramics obtained by the current preparation method of wall-flow silicon carbide honeycomb ceramics has high thermal expansion coefficient, high firing temperature, uneven micropore size and distribution in the wall, poor mechanical properties of the product, and high production cost.

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