Preparation method of porous silicon carbide ceramic support body

A porous silicon carbide and support technology, which is applied in ceramic products, chemical instruments and methods, sustainable biological treatment, etc., can solve the problems of hindering the development of silicon carbide ceramic technology, high brittleness of silicon carbide ceramics, and low purity of silicon carbide ceramics. , to avoid low product strength, high porosity, and ensure the effect of early mechanical properties

Active Publication Date: 2020-08-14
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the solid-phase sintering method is mostly used to prepare silicon carbide ceramic supports, but the characteristics of solid-phase sintered silicon carbide ceramics, such as high brittleness and high hardness, make molding and processing difficult, and there are factors such as high cost, complicated process, and long preparation cycle. The difficulty of preparing ceramic parts with complex shapes makes the prepared silicon carbide ceramics have low purity and relatively weak corrosion resistance
This will undoubtedly hinder the development of silicon carbide ceramic technology to a certain extent.

Method used

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  • Preparation method of porous silicon carbide ceramic support body

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Effect test

Embodiment 1

[0034] A preparation method of a porous silicon carbide ceramic support body, the specific steps are as follows:

[0035] 1) Mix coarse silicon carbide and fine particle silicon carbide at a mass ratio of 90:10, stir evenly, and obtain mixed silicon carbide for use; mix methyl cellulose, tetramethylammonium hydroxide, and polyethyleneimine by Mix at a mass ratio of 1:1:0.8 to obtain a dispersant;

[0036] 2) Weigh each raw material according to the proportion, each raw material and its mass percentage are: mixed silicon carbide 65%, dispersant 1%, silicon dioxide powder 10%, foaming agent 1%, styrene-acrylic emulsion 23%;

[0037] 3) Add the weighed mixed silicon carbide, dispersant and silicon dioxide into the styrene-acrylic emulsion (13% of the total amount of raw materials) and stir to obtain a uniformly dispersed silicon carbide slurry; the weighed blowing agent and the remaining Add the styrene-acrylic emulsion solvent into the foaming machine and stir for 3 minutes; th...

Embodiment 2

[0042] A preparation method of a porous silicon carbide ceramic support body, the specific steps are as follows:

[0043] 1) Mix coarse silicon carbide and fine silicon carbide at a mass ratio of 93:7, stir evenly to obtain mixed silicon carbide for use; mix methyl cellulose, tetramethylammonium hydroxide, and polyethyleneimine by 1:1.2:1 mass ratio mixing, get dispersant;

[0044] 2) Weigh each raw material according to the proportion, each raw material and its mass percentage are: mixed silicon carbide powder 66%, dispersant 1%, silicon dioxide powder 8%, foaming agent 1%, styrene-acrylic emulsion solvent twenty four%;

[0045] 3) Add the weighed mixed silicon carbide, dispersant and silicon dioxide into the styrene-acrylic emulsion (12% of the total amount of raw materials) and stir to obtain a uniformly dispersed silicon carbide slurry; mix the weighed blowing agent and the remaining The styrene-acrylic emulsion solvent was added to the foaming machine and stirred for 5 ...

Embodiment 3

[0050] A preparation method of a porous silicon carbide ceramic support body, the specific steps are as follows:

[0051] 1) Mix coarse silicon carbide and fine silicon carbide at a mass ratio of 95:5, stir evenly, and obtain mixed silicon carbide for use; mix methyl cellulose, tetramethylammonium hydroxide, and polyethyleneimine by Mix at a mass ratio of 1:1:1 to obtain a dispersant;

[0052] 2) Weigh each raw material according to the proportion, each raw material and its mass percentage are: mixed silicon carbide powder 63%, dispersant 1.5%, silicon dioxide powder 11%, blowing agent 1.5%, styrene-acrylic emulsion solvent twenty three%;

[0053] 3) Add the weighed mixed silicon carbide, dispersant and silicon dioxide into the styrene-acrylic emulsion (11% of the total amount of raw materials) and stir to obtain a uniformly dispersed silicon carbide slurry; mix the weighed blowing agent and the remaining The styrene-acrylic emulsion solvent was added to the foaming machine ...

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Abstract

The invention discloses a preparation method of a porous silicon carbide ceramic support. The preparation method comprises the following steps: uniformly mixing mixed silicon carbide powder, silicon dioxide powder, a foaming agent, a dispersing agent and a thermosetting polymer emulsion used as main raw materials to obtain high-solid-content silicon carbide slurry, and then pouring, and carrying out pressureless sintering molding to obtain the porous silicon carbide ceramic support, wherein the mixed silicon carbide powder is formed by mixing large-particle-size silicon carbide powder and small-particle-size silicon carbide powder. The porous silicon carbide ceramic support body has the advantages of high strength, high temperature resistance, acid and alkali corrosion resistance and the like, ceramic matrixes of separation membrane materials with different specifications and different shape structures can be designed according to process requirements, and the porous silicon carbide ceramic support body can also be independently used as a separation filtering material of large-particle substances; and the related preparation method is simple, flexible in process control, relativelylow in cost and short in molding process period, and has important application and popularization values.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional materials, and in particular relates to a preparation method of a porous silicon carbide ceramic support body. Background technique [0002] In recent years, as industrial activities have become more frequent, most industrial emissions have been discharged directly without strict treatment, resulting in more and more serious air and water pollution problems: for example, the emissions of fine particles in the provinces of North China exceeded the standard, and there were A large area of ​​smog weather has brought inconvenience to people's transportation and travel, and it has also brought great harm to people's health; the wastewater produced by industrial activities contains heavy metal ions that are highly toxic and difficult to degrade, causing rivers, Destruction of soil and environment; etc. Under the policy of vigorously advocating a "resource-saving and environment-friend...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/10C04B35/565C04B35/634B01D65/00B01D71/02
CPCC04B38/106C04B35/565C04B35/63408B01D65/00B01D71/02C04B2235/96C04B2235/9692C04B38/0067C04B38/0074Y02W10/10
Inventor 徐慢沈凡韦国苏陈常连季家友戴武斌朱丽王树林石和彬薛俊曹宏
Owner WUHAN INSTITUTE OF TECHNOLOGY
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