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Preparation method of pure silicon carbide porous ceramic membrane

A technology of porous ceramic membrane and pure silicon carbide, which is applied in the direction of ceramic products, applications, household appliances, etc., to achieve the effect of broadening the scope of use, improving high temperature resistance, and good high temperature resistance

Active Publication Date: 2015-01-07
湖北迪洁膜科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After these two stages of improvement, the service life of the existing inorganic ceramic membrane materials in harsh environments has been greatly improved, but the performance of its bonding material is still the weak link of the existing inorganic ceramic membrane materials, and there is still a lot to be done. room for improvement

Method used

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  • Preparation method of pure silicon carbide porous ceramic membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Forming of silicon carbide blank

[0027] A1. Selection of raw materials: Silicon carbide powder Ⅰ, silicon carbide powder Ⅱ, low-density polyethylene, dibutyl phthalate are selected according to the mass ratio of 100:10:4:0.1 for use;

[0028] B1. Mixing of raw materials: raw materials selected in proportion are mixed at a temperature of 120°C to form a uniform mixture;

[0029] C1. Forming of silicon carbide blanks: Put the mixture obtained in step B1 into an extrusion molding machine to form multi-channel tubular blanks.

[0030] 2) Coating of silicon carbide film layer

[0031] A2. Preparation of silicon carbide film layer slurry: water, silicon carbide powder III, silicon carbide powder VI, and cellulose ether are mixed uniformly at a mass ratio of 100:30:3:0.08 to prepare a silicon carbide film layer slurry;

[0032] B2. Coating of the silicon carbide film layer: inject the film layer slurry into the channel of the plain embryo prepared according to step 1), ...

Embodiment 2

[0041] 1) Forming of silicon carbide blank

[0042] A1. Selection of raw materials: Silicon carbide powder Ⅰ, silicon carbide powder Ⅱ, low-density polyethylene, dibutyl phthalate are selected according to the mass ratio of 100:13:6:0.3 for use;

[0043] B1. Mixing of raw materials: raw materials selected in proportion are mixed at a temperature of 120°C to form a uniform mixture;

[0044] C1. Forming of silicon carbide blanks: Put the mixture obtained in step B1 into an extrusion molding machine to form multi-channel tubular blanks.

[0045] 2) Coating of silicon carbide film layer

[0046] A2. Preparation of silicon carbide film layer slurry: water, silicon carbide powder III, silicon carbide powder VI, and cellulose ether are uniformly mixed at a mass ratio of 100:35:4:0.3 to prepare a silicon carbide film layer slurry;

[0047] B2. Coating of the silicon carbide film layer: inject the film layer slurry into the channel of the plain embryo prepared according to step 1), a...

Embodiment 3

[0055] 1) Forming of silicon carbide blank

[0056] A1. Selection of raw materials: silicon carbide powder Ⅰ, silicon carbide powder Ⅱ, low-density polyethylene, and dibutyl phthalate are selected according to the mass ratio of 100:15:8:0.4 for use;

[0057] B1. Mixing of raw materials: raw materials selected in proportion are mixed at a temperature of 120°C to form a uniform mixture;

[0058] C1. Forming of silicon carbide blanks: Put the mixture obtained in step B1 into an extrusion molding machine to form multi-channel tubular blanks.

[0059] 2) Coating of silicon carbide film layer

[0060] A2. Preparation of silicon carbide film layer slurry: water, silicon carbide powder III, silicon carbide powder VI, and cellulose ether are uniformly mixed in a mass ratio of 100:40:5:0.4 to prepare a silicon carbide film layer slurry;

[0061] B2. Coating of the silicon carbide film layer: inject the film layer slurry into the channel of the blank prepared according to step 1), and ...

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Abstract

The invention relates to a preparation method of a pure silicon carbide porous ceramic membrane, which comprises the following steps: 1) forming a silicon carbide biscuit; 2) applying a silicon carbide membranous layer; and 3) sintering the pure silicon carbide porous ceramic. Since the silicon carbide has better high temperature resistance, corrosion resistance and thermal shock resistance than the alumina, cordierite, mullite and the like, the pure silicon carbide porous ceramic membrane material, which is prepared by using the fine-particle silicon carbide as the adhesive and large-particle silicon carbide as the aggregate as well as a composite pore forming agent and other materials, has greatly better high temperature resistance, corrosion resistance and thermal shock resistance, greatly widens the application range of the inorganic ceramic membrane, prolongs the service life under severe conditions, and has wide application prospects.

Description

technical field [0001] The invention belongs to the technical field of inorganic non-metallic materials, and in particular relates to a preparation method of a pure silicon carbide porous ceramic membrane. Background technique [0002] High-performance membrane materials are the core materials of new high-efficiency separation technologies, and have become one of the common technologies to solve major problems in the fields of water resources, energy, and the environment. play an important role. The application coverage of high-performance membrane materials reflects the level of a country's process industry, energy utilization and environmental protection to a certain extent. Compared with organic membranes, inorganic membranes have better mechanical strength, heat resistance, and acid and alkali resistance, so inorganic ceramic membranes are an important development direction in the field of high-efficiency separation technology in the future. [0003] In recent years, w...

Claims

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Application Information

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IPC IPC(8): C04B38/06C04B35/565C04B35/622
Inventor 徐慢石和彬沈凡季家友曹宏陈常连薛俊王树林安子博吴庭赵静祝云王亮
Owner 湖北迪洁膜科技有限责任公司
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