A kind of skin-making mud for skin-making based on large-scale honeycomb ceramic carrier

Abstract

The invention discloses a skin making mud based on a large honeycomb ceramic carrier for skin making. The skin making mud comprises the following ingredients in parts by weight: 10-30 parts of 325-mesh cordierite fine powder with the average particle size of 10-12 microns, 30-80 parts of 150-mesh cordierite coarse powder with the average particle size of 45-50 microns, 5-20 parts of greater than 200 meshes of washed kaolin powder, 5-10 parts of inorganic fibres, and 5-20 parts of an inorganic adhesive. The skin making mud disclosed by the invention is high in breaking strength, good in thermal shock resistance, strong in water resistance, free from dry cracks, and free from the need of heating-drying; cordierite powders with different particle sizes are used as aggregates, thus reducing the expansion coefficient difference between the skin making mud and the large honeycomb ceramic carrier, and enhancing the matching property; the thixotropy, flowability and settleability of the skin making mud are regulated by kaolin; silica sol is used as a mud adhesive, and meanwhile, ceramic polycrystalline fibres or glass fibres are added in the mud to achieve anti-cracking and reinforcing effects.

Description

technical field [0001] The invention relates to the field of manufacturing a honeycomb ceramic carrier, in particular to a skin-making mud for skin-making based on a large-scale honeycomb ceramic carrier. Background technique [0002] The severe smog weather that continues to appear is mainly caused by diesel vehicle exhaust. Exhaust emissions from diesel vehicles include particulate matter PM and nitrogen oxides NO x . At present, DOC+DPF technology is generally adopted in the world for the treatment of particulate matter PM in diesel vehicle exhaust, while for nitrogen oxides NO x The governance generally adopts DOC+SCR technology. Regardless of the above-mentioned technology, a large-scale high-pore density thin-walled honeycomb ceramic carrier must be used. For the honeycomb ceramic carrier with a diameter greater than 180mm, due to the distribution of pressure at the center and edge of the mold during molding, the large elastic deformation of the mold, and the const...

AI Technical Summary

Problems solved by technology

[0004] 1. The bonding with the carrier is not firm, and the bonding flexural strength is less than 1.0MPa;

[0005] 2. There will be cracks on the surface of the artificial leather during the working process;

[0006] 3. The artificial leather cannot withstand the thermal shock from 600°C to room temperature during the working process, and is prone to peeling and cracking;

[0007] 4. After drying, the artificial skin will peel off after being soaked in water for a period of time, and it will also crack or peel off after drying