Forming method of wall-flow type honeycomb ceramic carrier

Abstract

The invention relates to a forming method of a wall-flow honeycomb ceramic carrier blank for trapping diesel engine exhaust particles. Mix the pure silicon carbide and methyl cellulose mixed powder, pour the pure silicon carbide and methyl cellulose into the blender and stir, so that the silicon carbide powder and methyl cellulose powder can be mixed evenly; flour and water Mix the mixed flour aqueous solution and pour it into the mixer while stirring and mix the mud thoroughly; add tung oil to the mixed mud and stir for a few minutes to make the mud sticky and easy to stick together and mix the mud Put it in a container and seal it up to ensure that the moisture in the mud will not evaporate, and it will be stale for 1 day; then the mud is smelted, extruded and dried in a microwave oven, and finally the holes are blocked for drying, drying, and burning Just make it.

Description

Technical field: [0001] The invention relates to a forming method of a wall-flow honeycomb ceramic carrier for trapping diesel engine exhaust particles. Background technique: [0002] Patent application number 200610008498.1, title "Manufacturing method of nano low-temperature sintered high-purity silicon carbide honeycomb collector", the first method is to use pure silicon carbide as the porous ceramic aggregate, and use nano-silicon carbide or nano-silicon oxide as the sintering aid , the ratio of the two is controlled at 100: 1 ~ 5; methyl cellulose and tung oil are used as binders and plastic forming agents and appropriate amount of water, and the ratio of organic matter to water is controlled in the range of 1: 1 ~ 3 (weight ratio) ; The second is to configure a mixed solution of methylcellulose, tung oil and water (the three are in a weight percentage of 5:5:10) in a ratio of 25:100, and then mix the nano-sintering aid with the mixed solution. Put the micron silicon c...

AI Technical Summary

Problems solved by technology

Its shortcomings: First, the formula is not reasonable, nano-silicon carbide or nano-silicon oxide cannot be used as a sintering aid, and it cannot be fired into pure silicon carbide at high temperature, and a practical wall-flow honeycomb cannot be produced in the test Ceramic carrier; the second is the lack of trap microporous forming agent, the trap manufactured with this formula cannot form honeycomb micropores, and cannot achieve the purpose of trapping diesel exhaust particles; the third is nano-silicon carbide or nano-silicon oxide It does not have the function of a binder, and it cannot promote the viscosity of the mud during the mixing of the mud, nor can it promote the formation of pure silicon carbide at high temperature. In the test, neither good viscous mud nor manufacturing A practical wall-flow honeycomb ceramic carrier; the fourth is the lack of necessary mud forming additives, and the lack of trap micropore forming agent, it is impossible to form honeycomb micropores