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A method for preparing cerium oxide ceramic fiber boards by a precursor impregnation process

The technology of ceramic fiber board and impregnation process is applied in the field of inorganic non-metallic materials and cerium oxide ceramic fiber board production. The effect of uniform and improved drying speed

Active Publication Date: 2017-02-08
江苏省陶瓷研究所有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such conventional gaskets are highly flexible and tend to sag at both ends due to handling or other manipulations during assembly
In addition, conventional sealing gaskets have relatively low compressive strength, and when subjected to a certain compressive load, they will irreversibly shatter, thereby reducing the sealing performance of the gasket
Traditional ceramic gaskets (e.g., zirconia, alumina felt) used in liquid phase fuel cells absorb large amounts of electrolyte and have low strength, making them difficult to handle and install in fuel cells

Method used

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  • A method for preparing cerium oxide ceramic fiber boards by a precursor impregnation process
  • A method for preparing cerium oxide ceramic fiber boards by a precursor impregnation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The preparation method of the cerium oxide ceramic fiberboard of the present invention, concrete operation is as follows:

[0024] (1) Cutting: Cut the 3mm thick organic viscose fiber felt into the required size according to the firing shrinkage ratio;

[0025] (2) Solution preparation: use deionized water and Ce(NO 3 ) 3 ·6H 2 O was prepared into a cerium solution with a concentration of 0.4mol / l, and stirred evenly, then added 0.2% PVP to the solution, stirred while adding, and finally adjusted the pH of the cerium solution to 4 with (1:1) HCl;

[0026] (3) Cerium solution impregnation: put the cut fiber mat into the prepared cerium salt solution, control the solution temperature at 40°C, and immerse for 3 hours;

[0027] (4) Ammonia gas fumigation: take out the impregnated fiber felt from the solution, squeeze it dry, smooth it, and place the fiber felt in a closed container with ammonia water for 3 hours;

[0028] (5) Drying: take out the fiber mat from the airt...

Embodiment 2

[0036] The preparation method of the cerium oxide ceramic fiberboard of the present invention, concrete operation is as follows:

[0037] (1) Cutting: Cut the 6mm thick organic viscose fiber felt into the required size according to the firing shrinkage ratio;

[0038] (2) Solution preparation: use deionized water and Ce(NO 3 ) 3 ·6H 2 O was prepared into a cerium solution with a concentration of 0.6mol / l, and stirred evenly, then added 0.3% PVP to the solution, stirred while adding, and finally adjusted the pH of the cerium solution to 4 with (1:1) HCl;

[0039] (3) Cerium liquid impregnation: put the cut fiber mat into the prepared cerium salt solution, control the solution temperature at 50°C, and impregnate for 2 hours;

[0040] (4) Ammonia fumigation: the impregnated fiber felt is taken out from the solution, squeezed dry, smoothed, and the fiber felt is placed in an airtight container with ammonia water for 6 hours;

[0041] (5) Drying: take out the fiber mat from the a...

Embodiment 3

[0049] The preparation method of the cerium oxide ceramic fiberboard of the present invention, concrete operation is as follows:

[0050] (1) Cutting: Cut the organic viscose fiber felt with a thickness of 12mm into the required size according to the firing shrinkage ratio;

[0051] (2) Solution preparation: use deionized water and Ce(NO 3 ) 3 ·6H 2 O was prepared into a cerium solution with a concentration of 0.25mol / l, and stirred evenly, then added 0.1% PVP to the solution, stirred while adding, and finally adjusted the pH of the cerium solution to 4 with (1:1) HCl;

[0052] (3) Cerium solution impregnation: put the cut fiber mat into the prepared cerium salt solution, control the solution temperature at 55°C, and immerse for 6 hours;

[0053] (4) Ammonia fumigation: take out the impregnated fiber mat from the solution, squeeze it dry, smooth it, and place the fiber mat in a closed container with ammonia water for 10 hours;

[0054] (5) Drying: take out the fiber mat fr...

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Abstract

Belonging to the field of inorganic nonmetal materials, the invention relates to a preparation method for a cerium oxide ceramic fiber board. The method includes: impregnating viscose fiber in a cerium ion containing prepared solution, then carrying out mechanical drying, ammonia fumigation, microwave drying, and twice firing, thus obtaining the cerium oxide fiber board. The method provided by the invention has the advantages that: 1. a cerium nitrate containing solution impregnated viscose fiber felt is dried by microwave, thus realizing rapid drying, reducing energy consumption, and improving efficiency; 2. adding of a small amount of additive has certain effect on control of ceramic fiber diameter; 3. by means of ammonia fumigation method, the dispersity of ceramic fiber diameter is reduced, and the smoothness of the prepared fiber board is improved; and 4. the obtained cerium oxide fiber board is uniform and smooth, has good compactness, and has certain strength.

Description

technical field [0001] The invention belongs to the field of inorganic non-metallic materials, relates to ceramic fibers with excellent heat resistance and catalytic performance, and in particular relates to the field of cerium oxide ceramic fiber board production. Background technique [0002] Ceramic fiber materials have good electrical insulation, strong chemical stability, low thermal conductivity, small thermal melting, light weight, certain flexibility, and good operability. They are widely used in heat insulation, heat preservation, photocatalysis and other fields. It is used in aviation, aerospace and other components that require high temperature and mechanical properties; it is used as a filter material for high-temperature gas and liquid, and is an ideal energy-saving and efficiency-enhancing material. [0003] Ceramic fiber materials such as zirconia (ZrO 2 ) and alumina (Al 2 o 3 ) Gaskets have been used in high-temperature airtight refractory materials, espe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/50C04B35/622
Inventor 徐泽跃陆丽芳许小静
Owner 江苏省陶瓷研究所有限公司
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