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A kind of preparation method of thin-walled honeycomb ceramic carrier

A honeycomb ceramic carrier and technology of honeycomb ceramics, applied in the direction of ceramic products, catalyst carriers, chemical instruments and methods, etc., can solve the problems of low thermal expansion mechanical strength, insufficient thermal shock resistance, etc., to reduce thermal expansion coefficient and improve fluidity , Increase the effect of extrusion speed

Active Publication Date: 2021-07-13
凯龙蓝烽新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The currently produced cordierite honeycomb ceramics have low thermal expansion and high mechanical strength, but their thermal shock resistance is not enough

Method used

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  • A kind of preparation method of thin-walled honeycomb ceramic carrier

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Step 1, preparation of powder raw materials: 6wt% flaky raw kaolin with an average particle size of 5 μm, 24wt% calcined kaolin with an average particle size of 3 μm, 35wt% platy talcum powder with an average particle size of 12 μm, and 15wt% flaky talcum powder with an average particle size of 0.5 μm % α-alumina powder and the first distribution peak at 1 μm, the second distribution peak at 5 μm, and 10wt% spherical fused silica powder with an average particle diameter of 3 μm are uniformly mixed to obtain mixture I, and then weigh the total weight of mixture I 5wt% methyl cellulose mix evenly;

[0030] Step 2, mud preparation: Put the uniformly mixed powder raw material in step 1 into a kneader for kneading, then add 0.5wt% oleic acid, 0.5wt% potassium laurate, 5.0wt% synthetic base Oil and 30wt% water, the powder raw material gradually turns into a plastic mud block to complete the mud preparation;

[0031] Step 3, mud blank preparation: Put the mud block obtained i...

Embodiment 2

[0039] Step 1, preparation of powder raw materials: 7wt% flaky raw kaolin with an average particle size of 5 μm, 23wt% calcined kaolin with an average particle size of 3 μm, 40wt% platy talcum powder with an average particle size of 12 μm, and 17wt% flaky talcum powder with an average particle size of 0.5 μm % α-alumina powder and the first distribution peak at 1 μm, the second distribution peak at 5 μm, and 12wt% spherical fused silica powder with an average particle diameter of 3 μm are evenly mixed to obtain mixture I, and then weigh the total weight of mixture I 4wt% methyl cellulose mix evenly;

[0040] Step 2, mud preparation: put the uniformly mixed powder raw material in step 1 into a kneader for kneading, then add 0.8wt% oleic acid, 0.6wt% potassium laurate, 4.0wt% synthetic base Oil and 28wt% water, the powder raw material gradually turns into a plastic mud block to complete the mud preparation;

[0041] Step 3, mud blank preparation: Put the mud block obtained in s...

Embodiment 3

[0049] Step 1, preparation of powder raw materials: 8wt% flaky raw kaolin with an average particle size of 5 μm, 22wt% calcined kaolin with an average particle size of 3 μm, 45wt% platy talcum powder with an average particle size of 12 μm, and 20wt% flaky talcum powder with an average particle size of 0.5 μm % α-alumina powder and the first distribution peak at 1 μm, the second distribution peak at 5 μm, and 15wt% spherical fused silica powder with an average particle size of 3 μm are uniformly mixed to obtain mixture I, and then weigh the total weight of mixture I 3wt% methyl cellulose mix evenly;

[0050] Step 2, mud preparation: Put the uniformly mixed powder raw material in step 1 into a kneader for kneading, then add 1.0wt% oleic acid, 0.8wt% potassium laurate, 3.0wt% synthetic base Oil and 32wt% water, the powder raw material gradually turns into a plastic mud block to complete the mud preparation;

[0051] Step 3, mud blank preparation: Put the mud block obtained in st...

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Abstract

The invention discloses a preparation method of a thin-walled honeycomb ceramic carrier, which comprises the following steps: (1) powder raw material preparation; (2) mud preparation; (3) mud billet preparation; (4) extrusion molding; (5) ) drying and shaping; (6) body processing; (7) high temperature firing; (8) grinding; (9) skin grafting. The invention improves the fluidity of the mud by adding bimodal spherical silicon micropowder, increases the extrusion speed of the mud, reduces the coefficient of thermal expansion, and has thermal shock resistance of 800°C without cracking three times, and is suitable for national five and above emission standards.

Description

technical field [0001] The invention relates to the field of manufacturing honeycomb ceramic carriers, in particular to a method for preparing a thin-walled honeycomb ceramic carrier for motor vehicles. Background technique [0002] With the upgrading of national motor vehicle environmental protection standards, in order to meet the more stringent emission standards of China V and even China IV, catalysts used in the purification of motor vehicle exhaust put forward higher requirements for catalyst carriers. [0003] The currently produced cordierite honeycomb ceramics have low thermal expansion and high mechanical strength, but their thermal shock resistance is not enough. The patent literature of Chinese invention patent CN102424569B discloses a thermal shock-resistant thin-walled cordierite honeycomb ceramic and its preparation method. The catalyst carrier prepared by this method has high mechanical strength, moderate porosity, low expansion coefficient, and thermal shock...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B33/13C04B33/30C04B33/32C04B38/00C04B41/81B01J32/00B01J35/04
CPCC04B33/1305C04B33/131C04B33/1315C04B33/30C04B33/32C04B38/0006C04B41/009C04B41/45C04B41/81C04B2235/9607C04B2235/612C04B2235/3418B01J35/56
Inventor 孙敏朱增赞王春艳刘军郭耘詹望成徐欢丁宇恒赵磊蓝亚新邱祥力
Owner 凯龙蓝烽新材料科技有限公司