Method for preparing laminated conductive titanium-aluminum-carbon honeycomb ceramic by using element powder in situ and application

Abstract

The invention relates to the field of conductive honeycomb ceramic, and in particular relates to a method for preparing laminated conductive titanium-aluminum-carbon honeycomb ceramic by using element powder in situ and application. The method comprises the following steps: by taking Ti powder, Al powder and graphite powder as raw materials, adding an organic binding agent, a plastic agent and a lubricant, smelting, aging, performing extrusion molding, cutting, drying and performing pressureless sintering in an atmosphere furnace. The heating can be performed in two stages, namely, the heating velocity of the first stage is 2-5 DEG C / minute, and the temperature is kept for 2-6 hours below the melting point Al (600-650 DEG C); the heating velocity of the second stage is 2-5 DEG C / minute, the sintering temperature is 1400-1500 DEG C, and the sintering time is 0.5-3 hours, thereby preparing the conductive titanium-aluminum-carbon honeycomb ceramic. By adopting the method, the defect that the production cost is high when prepared titanium-aluminum-carbon powder is taken as a raw material for preparing the titanium-aluminum-carbon honeycomb ceramic is solved, as the heating procedures are precisely designed, the thermal explosion reaction is effectively avoided, and thus the titanium-aluminum-carbon honeycomb ceramic of regular shapes can be prepared.

Description

technical field

[0001] The invention relates to the field of conductive honeycomb ceramics, in particular to a method and application for in-situ preparation of layered conductive titanium-aluminum-carbon honeycomb ceramics by using element powder. Background technique

[0002] Today, the number of automobiles is increasing rapidly, resulting in an increasing amount of automobile exhaust emissions. Carbon monoxide (CO), hydrocarbons (C x h y ), oxygen and nitrogen compounds (NO x ), sulfur dioxide, solid particles and aldehydes have a strong pungent taste or carcinogenic effect, and have become important sources of air pollution.

[0003] In order to reduce the pollution of exhaust gas, internal purification measures such as exhaust gas recirculation and delayed ignition time and external measures such as high-efficiency catalytic technology are mainly adopted. High-efficiency catalytic technology converts CO, C x h y , NO x converted to CO 2 、H 2 O, N 2 , the thre...

Examples

Embodiment 1

[0033]Using absolute ethanol as the medium, Ti powder (325 mesh), Al powder (10 μm), graphite powder (1 μm) and binder dextrin (accounting for 8% of the weight of the ceramic powder) are mixed in molar ratio Ti: Al: C The ratio of 2:1.48:1 is mixed, wet mixed in a polyurethane ball mill tank, the volume ratio of the mixed material to absolute ethanol is 3:2, the weight ratio of the ball to material is 1.5, and the wet mixing time is 8 hours. After the mixed powder is dried, add a solution made of plasticizer glycerin and deionized water for kneading. The amount of deionized water added is 13% of the weight of the ceramic powder, and the amount of glycerin added is 2% of the weight of the ceramic powder. . Lubricant edible oil is added, and kneading is continued to finally obtain a ceramic mud body, and the amount of the lubricant added is 0.8% of the weight of the ceramic powder. After aging for 12 hours, use a single cross-section of 30×30mm 2 , It can extrude 200 through t...

Embodiment 2

[0035] Using absolute ethanol as the medium, Ti powder (325 mesh particle size), Al powder (10 μm), graphite powder (1 μm) and binder starch (accounting for 5% of the weight of the ceramic powder) were mixed according to the molar ratio Ti: Al: C The ratio of 2:1.48:1 is mixed, wet mixed in an agate ball mill jar, the volume ratio of the mixture to absolute ethanol is 2:1, the weight ratio of the ball to material is 0.5, and the wet mixing time is 6 hours. After the mixed powder is dried, add a solution made of plasticizer glycerin and deionized water for mixing. The amount of deionized water added is 12% of the weight of the ceramic powder, and the amount of glycerin added is 1% of the weight of the ceramic powder. . Lubricant edible oil is added, and kneading is continued to finally obtain a ceramic mud body, and the amount of lubricant added is 0.5% of the weight of the ceramic powder. After aging for 12 hours, a single section is 30×30mm 2 , It can extrude 200 through th...

Embodiment 3

[0037] Using absolute ethanol as the medium, Ti powder (325 mesh particle size), Al powder (10 μm), graphite powder (1 μm) and binder starch (accounting for 10% of the weight of the ceramic powder) were mixed in molar ratio Ti: Al: C Mix in the ratio of 3:1.2:1.8, wet mix in an agate ball mill jar, the volume ratio of the mixture to absolute ethanol is 3:2, the weight ratio of the ball to material is 2, and the wet mixing time is 12 hours. After the mixed powder is dried, add a solution made of plasticizer glycerin and deionized water for mixing. The amount of deionized water added is 16% of the weight of the ceramic powder, and the amount of glycerin added is 3% of the weight of the ceramic powder. . Lubricant mineral oil is added, and the kneading is continued to finally obtain ceramic mud. The amount of mineral oil added is 1% of the weight of the ceramic powder. After aging for 12 hours, a single section is 30×30mm 2 , It can extrude 200 through the mold with square hole...

technical field

[0001] The invention relates to the field of conductive honeycomb ceramics, in particular to a method and application for in-situ preparation of layered conductive titanium-aluminum-carbon honeycomb ceramics by using element powder. Background technique

[0002] Today, the number of automobiles is increasing rapidly, resulting in an increasing amount of automobile exhaust emissions. Carbon monoxide (CO), hydrocarbons (C x h y ), oxygen and nitrogen compounds (NO x ), sulfur dioxide, solid particles and aldehydes have a strong pungent taste or carcinogenic effect, and have become important sources of air pollution.

[0003] In order to reduce the pollution of exhaust gas, internal purification measures such as exhaust gas recirculation and delayed ignition time and external measures such as high-efficiency catalytic technology are mainly adopted. High-efficiency catalytic technology converts CO, C x h y , NO x converted to CO 2 、H 2 O, N 2 , the thre...

Examples

Embodiment 1

[0033]Using absolute ethanol as the medium, Ti powder (325 mesh), Al powder (10 μm), graphite powder (1 μm) and binder dextrin (accounting for 8% of the weight of the ceramic powder) are mixed in molar ratio Ti: Al: C The ratio of 2:1.48:1 is mixed, wet mixed in a polyurethane ball mill tank, the volume ratio of the mixed material to absolute ethanol is 3:2, the weight ratio of the ball to material is 1.5, and the wet mixing time is 8 hours. After the mixed powder is dried, add a solution made of plasticizer glycerin and deionized water for kneading. The amount of deionized water added is 13% of the weight of the ceramic powder, and the amount of glycerin added is 2% of the weight of the ceramic powder. . Lubricant edible oil is added, and kneading is continued to finally obtain a ceramic mud body, and the amount of the lubricant added is 0.8% of the weight of the ceramic powder. After aging for 12 hours, use a single cross-section of 30×30mm 2 , It can extrude 200 through t...

Embodiment 2

[0035] Using absolute ethanol as the medium, Ti powder (325 mesh particle size), Al powder (10 μm), graphite powder (1 μm) and binder starch (accounting for 5% of the weight of the ceramic powder) were mixed according to the molar ratio Ti: Al: C The ratio of 2:1.48:1 is mixed, wet mixed in an agate ball mill jar, the volume ratio of the mixture to absolute ethanol is 2:1, the weight ratio of the ball to material is 0.5, and the wet mixing time is 6 hours. After the mixed powder is dried, add a solution made of plasticizer glycerin and deionized water for mixing. The amount of deionized water added is 12% of the weight of the ceramic powder, and the amount of glycerin added is 1% of the weight of the ceramic powder. . Lubricant edible oil is added, and kneading is continued to finally obtain a ceramic mud body, and the amount of lubricant added is 0.5% of the weight of the ceramic powder. After aging for 12 hours, a single section is 30×30mm 2 , It can extrude 200 through th...

Embodiment 3

[0037] Using absolute ethanol as the medium, Ti powder (325 mesh particle size), Al powder (10 μm), graphite powder (1 μm) and binder starch (accounting for 10% of the weight of the ceramic powder) were mixed in molar ratio Ti: Al: C Mix in the ratio of 3:1.2:1.8, wet mix in an agate ball mill jar, the volume ratio of the mixture to absolute ethanol is 3:2, the weight ratio of the ball to material is 2, and the wet mixing time is 12 hours. After the mixed powder is dried, add a solution made of plasticizer glycerin and deionized water for mixing. The amount of deionized water added is 16% of the weight of the ceramic powder, and the amount of glycerin added is 3% of the weight of the ceramic powder. . Lubricant mineral oil is added, and the kneading is continued to finally obtain ceramic mud. The amount of mineral oil added is 1% of the weight of the ceramic powder. After aging for 12 hours, a single section is 30×30mm 2 , It can extrude 200 through the mold with square hole...

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