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High temperature-resistant porous ceramic material and preparation method thereof

A technology of porous ceramics and high temperature resistance, which is applied in the field of ceramic materials, and can solve the problems of SiC whisker-reinforced porous ceramic materials, lack of porosity, high temperature resistance and flexural strength, and no research on SiC porous ceramic materials. , to achieve the effect of improving gas permeability, facilitating installation and disassembly of the screening mechanism, and facilitating maintenance and replacement

Inactive Publication Date: 2019-09-06
彭雅妮
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned patents are all related to the field of functional ceramics, and there is still little research on the use of SiC whiskers to reinforce porous ceramic materials, especially the research on the preparation of SiC porous ceramic materials.
The porous ceramic material prepared in the prior art does not have good porosity, high temperature resistance and flexural strength, and the existing preparation process is complex in operation, labor intensive, and high in cost. Therefore, a high temperature resistant porous ceramic material and its Preparation

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  • High temperature-resistant porous ceramic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A high-temperature-resistant porous ceramic material, prepared from the following weight Kg raw materials, silicon carbide 25Kg, silicon carbide whiskers 4Kg, zirconia 5Kg, aluminum oxide 5Kg, polyvinyl alcohol 1Kg, n-octanol 1Kg, activated carbon 1Kg and humic Sodium acid 0.5Kg;

[0044] Wherein, the high temperature resistant porous ceramic material is prepared through the following steps:

[0045] Step 1. First weigh the above-mentioned various raw materials, place the mold on the tray 6, fix it by the manipulator 5, then open the box cover 22, and put silicon carbide, silicon carbide whiskers, zirconia, aluminum oxide, Alcohol and activated carbon are evenly mixed and added to the inner cylinder 21, water with 10% of the total weight of raw materials is added, sodium humate and polyvinyl alcohol are added, and then the second motor 16 is driven to drive the inner cylinder 21 and the screw rod 17 to rotate. The cylinder 21 rotates to perform ball milling on the raw ...

Embodiment 2

[0050] A high-temperature-resistant porous ceramic material is prepared from the following weight Kg raw materials, silicon carbide 40Kg, silicon carbide whiskers 6Kg, magnesium oxide 7.5Kg, titanium dioxide 7.5Kg, polyvinyl alcohol 5Kg, n-octanol 5Kg, activated carbon 5Kg and rotten Sodium phytate 1Kg;

[0051] Wherein, the high temperature resistant porous ceramic material is prepared through the following steps:

[0052] Step 1, first weigh the above-mentioned various raw materials, place the mold on the tray 6, fix it by the manipulator 5, then open the case cover 22, and place silicon carbide, silicon carbide whiskers, magnesium oxide, titanium dioxide, n-octanol and After the active carbon is mixed evenly, add it to the inner cylinder 21, add 30% water of the total weight of raw materials, and add sodium humate and polyvinyl alcohol, and then drive the second motor 16 to drive the inner cylinder 21 and the screw rod 17 to rotate. 21 rotations to perform ball milling on ...

Embodiment 3

[0057] A high-temperature-resistant porous ceramic material is prepared from the following weight Kg raw materials, silicon carbide 25Kg, silicon carbide whiskers 6Kg, nickel oxide 5Kg, silicon dioxide 7.5Kg, polyvinyl alcohol 1Kg, n-octanol 5Kg, activated carbon 1Kg and Sodium humate 1Kg;

[0058] Wherein, the high temperature resistant porous ceramic material is prepared through the following steps:

[0059] Step 1. First weigh the above-mentioned various raw materials, put the mold on the tray 6, fix it by the manipulator 5, then open the box cover 22, and put the silicon carbide, silicon carbide whiskers, nickel oxide, silicon dioxide, normal Octanol and activated carbon are evenly mixed and added to the inner cylinder 21, water with 20% of the total weight of the raw materials is added, sodium humate and polyvinyl alcohol are added, and then the second motor 16 is driven to drive the inner cylinder 21 and the screw rod 17 to rotate. The inner cylinder 21 rotates to perfo...

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Abstract

The invention discloses a high temperature-resistant porous ceramic material and a preparation method thereof. The porous ceramic material is prepared from, by weight, 25-40 parts of silicon carbide,4-6 parts of silicon carbide whiskers, 10-15 parts of a sintering aid, 1-5 parts of a binder, 1-5 parts of n-octanol, 1-5 parts of a pore-forming agent and 0.5-1 part of a grinding aid. The preparation method of the high temperature-resistant porous ceramic material comprises the following steps: weighing the above raw materials, placing a mold on a tray, fixing the mold by a manipulator, uniformly mixing the silicon carbide, the silicon carbide whiskers, the sintering aid, n-octanol and the pore-forming agent, and adding the obtained mixture into the inner cylinder of a molding machine. The ceramic material prepared in the invention has the advantages of improved gas permeability, expansion of the practical application range, improvement of the strength of porous ceramic, ensuring of theapplication in the actual process, low thermal conduction coefficient (less than 0.35 W / m.k), and good high temperature resistance.

Description

technical field [0001] The invention relates to the technical field of ceramic materials, in particular to a high-temperature-resistant porous ceramic material and a preparation method thereof. Background technique [0002] Ceramic materials refer to a class of inorganic non-metallic materials made of natural or synthetic compounds through shaping and high-temperature sintering. It has the advantages of high melting point, high hardness, high wear resistance and oxidation resistance. It can be used as structural material, tool material, and because ceramics also have some special properties, they can also be used as functional materials. [0003] A Chinese patent application (publication number CN102161594A) discloses a SiC whisker-reinforced SiC ceramic matrix composite material, and it is found that the highest bending strength can reach 500MPa, and the composite material has excellent comprehensive properties. Another example is that the Chinese patent application (publ...

Claims

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Application Information

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IPC IPC(8): C04B38/06C04B35/80C04B35/565C04B35/64C04B35/63C04B35/634C04B35/636B28B13/02B28B17/02
CPCB28B13/029B28B17/026C04B35/806C04B35/565C04B35/6313C04B35/634C04B35/63416C04B35/6365C04B35/64C04B38/0645C04B38/068C04B2235/3206C04B2235/3217C04B2235/3232C04B2235/3244C04B2235/3279C04B2235/3418
Inventor 不公告发明人
Owner 彭雅妮
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