Silicon carbide porous ceramic material and preparation method of silicon carbide porous ceramic material

A technology of porous ceramics and silicon carbide, applied in the field of material science, can solve the problems of high energy consumption, complex components and processes, and achieve the effect of low energy consumption and high promotion value

Active Publication Date: 2015-12-30
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Aiming at the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide a silicon carbide porous ceramic mat

Method used

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  • Silicon carbide porous ceramic material and preparation method of silicon carbide porous ceramic material
  • Silicon carbide porous ceramic material and preparation method of silicon carbide porous ceramic material
  • Silicon carbide porous ceramic material and preparation method of silicon carbide porous ceramic material

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0031] Example 1

[0032] Specific steps are as follows:

[0033] 1) Mix the raw materials according to the proportions shown in Table 1, first mechanically stir, and then ball mill to prepare a slurry; the silicon carbide powder adopts green silicon carbide;

[0034] 2) dipping and hanging the above-mentioned slurry on the template to obtain a preform; the template adopts an open polystyrene foam;

[0035] 3) Forming at low temperature according to the temperature shown in Table 1, and the heating time is 24h.

[0036] 4) Incubate at 160°C for 4h and fully solidify.

[0037] Table 1 Proportion and molding temperature of silicon carbide porous ceramic slurry

[0038]

[0039] testing method:

[0040] The measurement of open porosity is to first place the sample in water, and the change in the reading in the graduated cylinder is the sum of the volume of the sample and the volume of the closed mouth, and then seal the opening of the sample with silicone grease and place ...

Example Embodiment

[0052] Example 2

[0053] The difference between this example and Example 1 is that water is added on the basis of Example 1.

[0054] Specific steps are as follows:

[0055] 1) Mix the raw materials according to the proportioning in Table 5, first mechanically stir, and then ball mill to prepare slurry; the silicon carbide powder adopts black silicon carbide;

[0056] 2) dipping and hanging the above-mentioned slurry on the template to obtain a preform; the template adopts an open polyurethane foam;

[0057] 3) Forming at low temperature according to the temperature shown in Table 5, and the heating time is 36h.

[0058] 4) Incubate at 160°C for 4h to cure completely.

[0059] Table 5 The ratio and molding temperature of silicon carbide porous ceramic slurry

[0060]

[0061] Test Results:

[0062] Table 6 Test results of water glass: silicon carbide: water = 10: 3: 1 sample porosity and strength

[0063] molding temperature

[0064] Table 7 Test results of...

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Abstract

The invention discloses a silicon carbide porous ceramic material and a preparation method of the silicon carbide porous ceramic material. The preparation method comprises the following steps of firstly performing mechanical stirring on water glass, silicon carbide powder and water; then, performing ball milling to prepare slurry; next, immersing and hanging the slurry onto a template to obtain a pre-formed body; preserving the temperature for 24 to 36h at 40 to 100 DEG C; obtaining primarily solidified porous ceramics; finally, performing heating and heat preservation to obtain a finished product. The cost of the method is low; the prepared porous ceramic hole diameter and the porosity are controllable; the intensity is high; the chemical stability is high.

Description

technical field [0001] The invention belongs to the technical field of material science, and in particular relates to a porous ceramic material and a preparation method thereof. Background technique [0002] Porous ceramics are widely used in filtration, catalyst carrier, thermal materials, sound-absorbing materials, etc. [0003] The filtration characteristics of porous ceramics depend on the shape, size and distribution of pores, which are closely related to the process. [0004] Porous silicon carbide ceramics have excellent properties that other ceramics do not have, such as high thermal shock resistance, high specific strength, low thermal conductivity, oxidation resistance, wear resistance, and good chemical stability. [0005] The preparation of porous ceramics mainly includes adding pore-forming agent method, sol-gel method, template method, solid-state reaction sintering method and so on. [0006] Adding pore-forming agent method: For example, the invention patent...

Claims

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Application Information

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IPC IPC(8): C08L25/06C08L75/04C08K3/34C04B35/565C04B38/08
Inventor 刘玉付沈杰
Owner SOUTHEAST UNIV
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