CN113429214B - Skin grafting pug for honeycomb ceramics and application thereof - Google Patents

Skin grafting pug for honeycomb ceramics and application thereof Download PDF

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CN113429214B
CN113429214B CN202110835838.2A CN202110835838A CN113429214B CN 113429214 B CN113429214 B CN 113429214B CN 202110835838 A CN202110835838 A CN 202110835838A CN 113429214 B CN113429214 B CN 113429214B
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grafting
skin
pug
fiber
particle size
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CN113429214A (en
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张俊超
冯家迪
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JIANGSU PROVINCE YIXING NONMETALLIC CHEMICAL MACHINERY FACTORY CO Ltd
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JIANGSU PROVINCE YIXING NONMETALLIC CHEMICAL MACHINERY FACTORY CO Ltd
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Abstract

The invention discloses a skin grafting pug for honeycomb ceramics and application thereof, belonging to the technical field of ceramic skin grafting. The skin grafting pug comprises the following raw materials in percentage by mass: 35-45% of spherical silica powder, 3-8% of titanium dioxide, 8-12% of quartz, 15-25% of silica sol, 1-5% of methyl and 15-25% of reinforcing fiber, wherein the sum of the mass fractions of the raw materials is 100%. The invention adopts the mixture of the aluminum silicate fiber and the graphite fiber or the aluminum silicate fiber as the reinforcing fiber to prepare the skin-grafting pug, and the skin-grafting pug is applied to ceramic products to obtain the products with better performances such as strength, thermal expansion coefficient, thermal shock resistance and the like, thereby having good application prospect.

Description

Skin grafting pug for honeycomb ceramics and application thereof
Technical Field
The invention belongs to the technical field of ceramic skin grafting, and particularly relates to a skin grafting pug for honeycomb ceramics and application thereof.
Background
The honeycomb ceramic is a novel ceramic product with a structure similar to a honeycomb shape, and a honeycomb ceramic carrier is widely applied to the field of motor vehicle exhaust purification and is a ceramic product with a honeycomb structure with an outer skin. The quality of the skin-grafting pug directly influences the properties of the product such as strength, thermal expansion coefficient, thermal shock resistance and the like, thereby limiting the application range of the product. At present, the thermal shock property of the honeycomb ceramic product is required to be 650 ℃, but the honeycomb ceramic product cannot meet the requirement due to the influence of the skin-grafting pug, and the formula and application of the skin-grafting pug need to be optimized and improved.
Disclosure of Invention
In view of the problems in the prior art, one technical problem to be solved by the present invention is to provide a skin-grafting paste for honeycomb ceramics, which uses a mixture of alumina silicate fibers and graphite fibers or alumina silicate fibers as reinforcing fibers. The invention aims to solve another technical problem of providing an application of the skin grafting pug for honeycomb ceramics in honeycomb ceramic skin grafting, wherein the skin grafting pug is applied to a ceramic product to obtain the product with better performances such as strength, thermal expansion coefficient, thermal shock property and the like.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
a skin grafting pug for honeycomb ceramics is composed of the following raw materials in parts by mass: 35-45% of spherical silica powder, 3-8% of titanium dioxide, 8-12% of quartz, 15-25% of silica sol, 1-5% of methyl and 15-25% of reinforcing fiber, wherein the sum of the mass fractions of the raw materials is 100%.
The skin-grafting pug for the honeycomb ceramics is characterized in that the reinforcing fiber is any one of a mixture of aluminum silicate fiber and graphite fiber or aluminum silicate fiber.
The skin grafting pug for the honeycomb ceramics is characterized in that the reinforcing fibers are a mixture of aluminum silicate fibers and graphite fibers, wherein the mass ratio of the aluminum silicate fibers to the graphite fibers is 1.
The skin-grafting pug for the honeycomb ceramics comprises 40% of spherical silica micropowder, 5% of titanium dioxide, 10% of quartz, 20% of silica sol, 5% of methyl and 20% of aluminum silicate fiber.
The skin-grafting pug for honeycomb ceramics comprises 40% of spherical silica micropowder, 5% of titanium dioxide, 10% of quartz, 20% of silica sol, 5% of methyl, 10% of aluminum silicate fiber and 10% of graphite fiber.
The particle size D50 of the spherical silicon micro powder is 15-30 mu m, the particle size D50 of the titanium dioxide is 0.5-1.2 mu m, the particle size D50 of the quartz is 65-80 mu m, the length of the reinforcing fiber is 200-350 mu m, and the diameter of the reinforcing fiber is 8-15 mu m.
The skin grafting pug for the honeycomb ceramics is applied to the skin grafting of the honeycomb ceramics.
The application of the skin grafting pug for honeycomb ceramics in honeycomb ceramic skin grafting comprises the following steps:
(1) Weighing 35% -45% of spherical silica micropowder, 3% -8% of titanium dioxide, 8% -12% of quartz, 15% -25% of silica sol, 1% -5% of methyl and 15% -25% of reinforcing fiber, wherein the sum of the mass fractions of the raw materials is 100%; the particle size D50 of the spherical silicon micro powder is 15-30 μm, the particle size D50 of the titanium dioxide is 0.5-1.2 μm, the particle size D50 of the quartz is 65-80 μm, the length of the reinforcing fiber is 200-350 μm, and the diameter is 8-15 μm;
(2) Uniformly mixing the raw materials in the step (1) into skin grafting pug;
(3) Providing a honeycomb ceramic blank, attaching the aged pug to the surface of the blank, and grafting skin on the blank, wherein the skin grafting thickness is 1.0mm;
(4) And (3) placing the blank body subjected to skin grafting in the air, and drying in the shade for 24 hours to obtain a finished product.
Has the beneficial effects that: compared with the prior art, the invention has the advantages that:
the invention adopts the mixture of the aluminum silicate fiber and the graphite fiber or the aluminum silicate fiber as the reinforcing fiber to obtain the skin-grafting pug, and the skin-grafting pug is applied to ceramic products to obtain the products with better performances such as strength, thermal expansion coefficient, thermal shock resistance and the like, thereby having good application prospect.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying specific embodiments of the present invention are described in detail below.
Comparative example 1
A skin grafting method for honeycomb ceramics comprises the following steps:
(1) Weighing 40% of spherical silica micropowder, 5% of titanium dioxide, 10% of quartz, 20% of silica sol, 5% of methyl and 20% of asbestos fiber;
(2) Uniformly mixing the raw materials in the step (1) into skin grafting pug;
(3) Providing a honeycomb ceramic blank, attaching the aged pug to the surface of the blank, and grafting skin on the blank, wherein the skin grafting thickness is 1.0mm;
(4) And (3) placing the blank body subjected to skin grafting in the air, and drying in the shade for 24 hours to obtain a finished product.
The product prepared by the method is tested in terms of strength, thermal expansion coefficient, thermal shock resistance and the like, and the results are shown in table 1. As can be seen from Table 1, the product with low thermal expansion coefficient has good thermal shock resistance, and the thermal shock resistance of the product is yet to be further enhanced.
Table 1 test results for comparative example 1 product
Figure BDA0003177259550000021
Figure BDA0003177259550000031
Example 1
A skin grafting method for honeycomb ceramics comprises the following steps:
weighing 40% of spherical silica micropowder, 5% of titanium dioxide, 10% of quartz, 20% of silica sol, 5% of methyl cellulose and 20% of aluminum silicate fiber; the particle size D50 of the raw material spherical silicon micro powder is 15 mu m, the particle size D50 of the titanium dioxide is 1.2 mu m, the particle size D50 of the quartz is 80 mu m, the length of the aluminum silicate fiber is 200 mu m, and the diameter of the aluminum silicate fiber is 8 mu m;
(2) Uniformly mixing the raw materials in the step (1) into skin grafting pug;
(3) Providing a honeycomb ceramic blank, attaching the aged pug to the surface of the blank, and grafting skin on the blank, wherein the skin grafting thickness is 1.0mm;
(4) And (3) placing the blank body subjected to skin grafting in the air, and drying in the shade for 24 hours to obtain a finished product.
The product prepared by the method is tested in terms of strength, thermal expansion coefficient, thermal shock resistance and the like, and the results are shown in table 2. As can be seen from Table 2, when aluminum silicate is used as the reinforcing fiber, the reinforcing fiber has an obvious effect of reducing the coefficient of thermal expansion of the product, and the thermal shock resistance of the product is indirectly improved.
Table 2 example 1 product test results
Figure BDA0003177259550000032
Figure BDA0003177259550000041
Example 2
A skin grafting method for honeycomb ceramics comprises the following steps:
(1) Weighing 40% of spherical silica micropowder, 5% of titanium dioxide, 10% of quartz, 20% of silica sol, 5% of methyl, 10% of aluminum silicate fiber and 10% of graphite fiber; (ii) a The particle size D50 of the raw material spherical silicon micro powder is 30 mu m, the particle size D50 of the titanium dioxide is 0.5 mu m, the particle size D50 of the quartz is 65 mu m, the length of the aluminum silicate fiber is 350 mu m, and the diameter of the aluminum silicate fiber is 15 mu m;
(2) Uniformly mixing the raw materials in the step (1) into skin grafting pug;
(3) Providing a honeycomb ceramic blank, attaching the aged pug to the surface of the blank, and grafting skin on the blank, wherein the skin grafting thickness is 1.0mm;
(4) And (3) placing the blank body subjected to skin grafting in the air, and drying in the shade for 24 hours to obtain a finished product.
The product prepared by the method is tested from the aspects of strength, thermal expansion coefficient, thermal shock resistance and the like, and the results are shown in table 3. As can be seen from table 3, when the mixture of the aluminum silicate fiber and the graphite fiber is used as the reinforcing fiber, various properties of the product are improved, and a good effect is obtained.
Table 3 example 2 product test results
Figure BDA0003177259550000042
Figure BDA0003177259550000051

Claims (3)

1. The skin-grafting pug for the honeycomb ceramics is characterized by comprising the following raw materials in percentage by mass: 40% of spherical silica micropowder, 5% of titanium dioxide, 10% of quartz, 20% of silica sol, 5% of methyl cellulose and 20% of aluminum silicate fiber;
or comprises the following raw materials in percentage by mass: 40% of spherical silica micropowder, 5% of titanium dioxide, 10% of quartz, 20% of silica sol, 5% of methyl cellulose, 10% of aluminum silicate fiber and 10% of graphite fiber;
wherein the particle size D50 of the spherical silicon micro powder is 15-30 μm, the particle size D50 of the titanium dioxide is 0.5-1.2 μm, the particle size D50 of the quartz is 65-80 μm, the length of the reinforcing fiber is 200-350 μm, and the diameter of the reinforcing fiber is 8-15 μm.
2. Use of the skin-grafting pug for honeycomb ceramics according to claim 1 in honeycomb ceramic skin grafting.
3. The use of the skin grafting pug for honeycomb ceramics according to claim 2 in honeycomb ceramic skin grafting, characterized by comprising the following steps:
(1) Weighing 40% of spherical silica micropowder, 5% of titanium dioxide, 10% of quartz, 20% of silica sol, 5% of methyl cellulose and 20% of reinforcing fiber; the particle size D50 of the spherical silicon micro powder is 15-30 μm, the particle size D50 of the titanium dioxide is 0.5-1.2 μm, the particle size D50 of the quartz is 65-80 μm, the length of the reinforcing fiber is 200-350 μm, and the diameter is 8-15 μm;
(2) Uniformly mixing the raw materials in the step (1) into skin grafting pug;
(3) Providing a honeycomb ceramic blank, attaching the aged pug to the surface of the blank, and grafting skin on the blank, wherein the skin grafting thickness is 1.0mm;
(4) And (3) placing the blank body subjected to skin grafting in the air, and drying in the shade for 24 hours to obtain a finished product.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2568898A1 (en) * 1984-03-05 1986-02-14 Fiber Materials Ceramic coated graphite fibres prodn.
CN105503235A (en) * 2015-12-15 2016-04-20 凯龙蓝烽新材料科技有限公司 Method for preparing honeycomb ceramics high in skin firmness and strong in thermal shock resistance
CN111170709A (en) * 2019-12-26 2020-05-19 南京柯瑞特种陶瓷股份有限公司 Preparation method of honeycomb ceramic outer skin grafting pug and prepared skin grafting pug
CN112608627A (en) * 2020-12-03 2021-04-06 山东奥福环保科技股份有限公司 Low-thermal-expansion honeycomb ceramic body peripheral coating material and preparation method thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040155387A1 (en) * 2003-02-06 2004-08-12 Fivas Joseph D. Graphite fiber-enhanced ceramic

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2568898A1 (en) * 1984-03-05 1986-02-14 Fiber Materials Ceramic coated graphite fibres prodn.
CN105503235A (en) * 2015-12-15 2016-04-20 凯龙蓝烽新材料科技有限公司 Method for preparing honeycomb ceramics high in skin firmness and strong in thermal shock resistance
CN111170709A (en) * 2019-12-26 2020-05-19 南京柯瑞特种陶瓷股份有限公司 Preparation method of honeycomb ceramic outer skin grafting pug and prepared skin grafting pug
CN112608627A (en) * 2020-12-03 2021-04-06 山东奥福环保科技股份有限公司 Low-thermal-expansion honeycomb ceramic body peripheral coating material and preparation method thereof

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