A large size cordierite honeycomb ceramic carrier for diesel engine
A technology of cordierite honeycomb and ceramic carrier, which is applied in ceramic products, applications, household appliances, etc., and can solve problems such as fluidity differences, defects, and effects on the purification effect of diesel engine exhaust.
Active Publication Date: 2018-08-14
JIANGSU PROVINCE YIXING NONMETALLIC CHEM MACHINERY FACTORY
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Problems solved by technology
Due to the in-situ synthesis of cordierite, the physical and chemical properties of the materials are different, and the fluidity during the extrusion molding process is different, which is prone to local deformation of the grid cell wall, resulting in defects, which in turn affects the effect of diesel engine exhaust purification.
Method used
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Embodiment Construction
[0018] Below in conjunction with embodiment, the present invention is described in detail.
[0019] Embodiment 1~9 and test example:
[0020] According to the amount of raw materials described in Table 1, a large-scale cordierite honeycomb ceramic carrier for diesel engines was prepared. During preparation, firstly mix talc 1, talc 2, talc and surfactant, and then mix with other raw materials, then extrude and calcinate. Extrusion molding and calcination adopt conventional technical parameters in the field, and the calcination temperature is 1200-1500°C. Among them, the use of surfactants is 1#, 4#, 7# using tall oil, 2#, 5#, 8# using lauric acid, 3#, 6#, 9# using acrylate
[0021] Table 1 shows the number of defects and qualified numbers of the ceramic carriers prepared in Examples 1-9.
[0022] Table 1 (unit kg)
[0023]
[0024] It can be seen from Table 1 that when the average particle size of the material is 15.0 μm, it should be more than 30%, the material with an...
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Abstract
The invention relates to a large-sized cordierite honeycomb ceramic carrier for a diesel engine. The large-sized cordierite honeycomb ceramic carrier is prepared from the following raw materials in parts by weight: 20-42 parts of talcum 1, 0-20 parts of talcum 2, 0-20 parts of aluminum oxide 1, 0-20 parts of aluminum oxide 2, 12-14 parts of silicon dioxide, 12-14 parts of calcined kaolin, 12-14 parts of raw kaoline and 0.2-0.4 part of a surfactant. According to the large-sized cordierite honeycomb ceramic carrier disclosed by the invention, in accordance with different physical and chemical properties of the raw materials for in situ synthesis of the cordierite, average grain sizes are adjusted, so that the synthesized cordierite materials have higher embedding compactability, so that in an extruding and shaping process, cellular ceramic wet semi-finished products have higher strength, and defects are reduced.
Description
technical field [0001] The invention relates to the technical field of diesel engine exhaust emission control, in particular to a large-size cordierite honeycomb ceramic carrier for diesel engines and a preparation method thereof. Background technique [0002] Large-size cordierite honeycomb ceramic carrier for diesel engine exhaust purification, with a diameter of ≥140mm, the carrier adopts a honeycomb structure, including many independent cells separated by cell walls, and the cell density is 280-330 / inch 2 , the channel wall thickness ≤ 0.17mm. [0003] The ceramic carrier is synthesized in situ with cordierite, using several materials, such as talc, alumina, silica and kaolin; adding 3% to 8% of organic binder and surfactant, and mixing them into cordierite mud. Due to the in-situ synthesis of cordierite, the physical and chemical properties of the materials are different, and the fluidity during the extrusion molding process is different, which is prone to local deform...
Claims
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IPC IPC(8): C04B38/00C04B35/195C04B35/622C04B35/626C04B35/634C04B35/632
CPCC04B35/195C04B35/622C04B35/62605C04B35/632C04B35/63424C04B35/63492C04B38/0006C04B2235/3217C04B2235/3418C04B2235/349C04B2235/96
Inventor 史亮冯家迪钱炳华
Owner JIANGSU PROVINCE YIXING NONMETALLIC CHEM MACHINERY FACTORY