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Preparation method of silicon carbide foamed ceramic

A technology of foam ceramics and silicon carbide, which is applied in the production field of high-tech ceramic products—foam ceramics, can solve problems such as high production costs, poor product reliability, and long production cycles, and reduce manpower demand and labor. Production process, the effect of avoiding product defects

Inactive Publication Date: 2014-05-14
JIANGSU WEISHI STRUCTURAL CERAMICS
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AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of low degree of automation, many procedures, high production cost, poor product reliability and long production cycle in the current preparation process of foam ceramic filters, the present invention proposes a silicon carbide with high degree of automation, stable product quality and short production cycle. Preparation method of foam ceramic filter

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] 1. Prepare a square foam ceramic sponge molding container, which is made of various common thermoplastic or thermosetting plastics, such as polypropylene. And make sure the inner surface is smooth.

[0016] 2. Evenly apply a release agent, such as butter, to the inner wall of the foam ceramic sponge forming container, and then place it in the foaming workshop.

[0017] 3. Preparation molding and curing process: at a temperature of about 15°C, 65kg of polyoxypropylene polyol (hydroxyl value 56) and modified polyester polyol (hydroxyl value 80, acid value Less than 1) Add 4kg of water, 2kg of cyclopentane, 0.15kg of A33 (33% solution of triethylenediamine), 0.05kgN,N-dimethylcyclohexylamine, 0.2kg stannous octoate and 0.2kg organosilicone were premixed, then 200kg silicon carbide micropowder, 18kg kaolin, 12kg alumina and Add 18kg of silica sol into the premix and stir well, then add 53kg of toluene diisocyanate with a specification of 80 / 20 and stir to form a mixture. ...

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Abstract

The invention discloses a preparation method of silicon carbide foamed ceramic, and relates to the field of production technologies of high-technology ceramic products-foamed ceramics. The preparation method comprises the steps of stirring polyester or polyester polyol with a catalyst, a surfactant and a foaming agent, adding silicon carbide, kaolin, alumina powder and silica solution to stir evenly, adding a curing agent to mix evenly and placing in a forming container for reaction and solidification, tapping the solidified foamed ceramic sponge, and carrying out high-temperature sintering to obtain the silicon carbide foamed ceramic. According to the preparation method, a three-dimensional foam-shaped ceramic body is directly formed through polymerization reaction and foaming process, so that the production process is greatly decreased, the obtained silicon carbide foamed ceramic has even and consistent structure, the manpower demand and the manpower labor can be greatly decreased, the production period is shortened and the performance stability of the product can be improved at the same time.

Description

technical field [0001] The invention relates to the technical field of production of foam ceramics, a high-tech ceramic product. Background technique [0002] Foam ceramics are ceramic products with a three-dimensional network skeleton structure. As a new type of inorganic non-metallic filter material, ceramic foam has the advantages of light weight, high strength, high temperature resistance, corrosion resistance, simple regeneration, long service life and good filtration and adsorption properties. Compared with traditional filters such as ceramic particles sintered Compared with body and glass fiber cloth, it is not only easy to operate, energy saving, low cost, but also has good filtering effect. It is evenly distributed and has interpenetrating micropores, so it has the advantages of low density, high porosity, large specific surface area, and low thermal conductivity. In addition, the manufacturing process of foam ceramics is simple, and by selecting different materia...

Claims

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Application Information

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IPC IPC(8): C04B38/02C04B35/565C04B35/622
Inventor 骆兵丁成进吉小冬
Owner JIANGSU WEISHI STRUCTURAL CERAMICS
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