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Manufacturing method of ultra-low thermal expansion coefficient honeycomb ceramics

A technology of honeycomb ceramics and expansion coefficient, which is applied in the direction of ceramic products, applications, household appliances, etc., can solve the problems of reducing the strength of ceramic carriers, insufficient thermal shock resistance of honeycomb ceramic carriers, and limited thermal shock resistance, and achieves significant social and economic benefits. Benefits, low thermal expansion coefficient, and improved thermal shock resistance

Pending Publication Date: 2018-12-18
顾永成
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of insufficient thermal shock resistance of the honeycomb ceramic carrier, it is very limited to rely on reducing the thickness of the ceramic carrier hole wall to improve the thermal shock resistance of the honeycomb ceramic carrier. The reduction of the ceramic carrier hole wall thickness also reduces the strength of the ceramic carrier

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] According to the raw material ratio of 2MgO-2Al for the production of low-expansion cordierite honeycomb ceramics 2 o 3 -5SiO2 2 Weigh the ingredients, and then add the special raw material CTTL produced by Gaochun Ceramics (CTTL is any one of CTTL-1, CTTL-2, CTTL-3, CTTL-4), the amount of CTTL added is "production of low expansion cordierite Raw material of honeycomb ceramics" 5wt% of the total amount. Then add 0.5wt% plasticizer (cellulose ether) and 10.0wt% lubricant (tung oil) and mix them uniformly and put them into a molding machine for extrusion molding. Dry at 800°C and burn at 1400°C to get a thermal expansion coefficient of 0.8×10 -6 ℃ -1 Advanced honeycomb ceramics, so that the thermal shock resistance of honeycomb ceramic products can reach 650 °C.

Embodiment 2

[0037]Weigh the ingredients according to the raw material ratio for the production of low-expansion cordierite honeycomb ceramics, and then add the special raw material CTTL produced by Gaochun Ceramics (CTTL is CTTL-5, CTTL-6, CTTL-7, CTTL-8, CTTL-9, CTTL -10), the amount of CTTL added is 10wt% of the total amount of "raw materials for producing low-expansion cordierite honeycomb ceramics". Add plasticizer and lubricant and mix evenly and put into molding machine for extrusion molding. Drying at 800°C and firing at 1400°C can give a thermal expansion coefficient of 0.6×10 -6 ℃ -1 Advanced honeycomb ceramics, so that the thermal shock resistance of honeycomb ceramic products can reach 800 °C.

Embodiment 3

[0039] Weigh the ingredients according to the raw material ratio for the production of low-expansion cordierite honeycomb ceramics, and then add the special raw material CTTL produced by Gaochun Ceramics (CTTL is any one of CTTL-1, CTTL-2, CTTL-3, and CTTL-4) , the addition amount of CTTL is 15wt% of the total amount of "raw materials for producing low-expansion cordierite honeycomb ceramics". Add plasticizer and lubricant and mix evenly and put into molding machine for extrusion molding. Dry at 800°C and burn at 1420°C to get a thermal expansion coefficient of 0.4×10 -6 ℃ -1 Advanced honeycomb ceramics, so that the thermal shock resistance of honeycomb ceramic products can reach 900 °C.

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Abstract

The invention discloses a manufacturing method of ultra-low thermal expansion coefficient honeycomb ceramics. The method comprises the following steps: weighing raw materials according to a raw material ratio for production of low-expansion cordierite honeycomb ceramics, adding a proper amount of raw materials containing high electric field strength ions, and evenly mixing; then, adding a plasticagent and a lubricant, and uniformly mixing to obtain a honeycomb ceramics clay; adding the obtained clay into a molding machine for carrying out extrusion molding, drying in a drying oven, and firingat 1350-1450 DEG C to obtain the honeycomb ceramics with a thermal expansion coefficient of 1.0*10<-6> DEG C<-1> to 0.4*10<-6> DEG C<-1>; therefore, the thermal shock resistance of the honeycomb ceramics product reaches up to 650 DEG C or above, and even reaches 800 DEG C. The ultra-low thermal expansion coefficient honeycomb ceramics can adapt to the needs of the development of modern automobileindustry. The manufacturing method can be used for manufacturing other ceramic products or inorganic material products, and significantly improves the thermal shock resistance of the product.

Description

technical field [0001] The invention belongs to the technical field of special ceramics, and in particular relates to a method for manufacturing ultra-low thermal expansion coefficient honeycomb ceramics. Background technique [0002] Honeycomb ceramics are a new type of special ceramics with a honeycomb-like structure developed in the past 30 years. It has high strength, high temperature resistance, corrosion resistance, good thermal shock resistance and so on. It has been widely used in automobile, chemical industry, electric power, metallurgy, petroleum, electronic appliances, machinery and other industries, and its development prospect is considerable. Honeycomb ceramics is a honeycomb ceramic material composed of countless equal straight-through holes of various shapes. Honeycomb ceramics are ideal carrier materials in the three-way Cui treatment of modern automobile exhaust. Honeycomb ceramics are also porous ceramic bodies with strong Excellent adsorption capacity, ...

Claims

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Application Information

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IPC IPC(8): C04B35/195C04B38/00
CPCC04B35/195C04B38/0006C04B2235/9607
Inventor 顾伟顾永成
Owner 顾永成
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