Preparation method of silicon carbide ceramic body for rubber mold

A silicon carbide ceramic and rubber mold technology, applied in the field of ceramic colloidal molding, can solve the problems of carbon inhibition, oxygen inhibition, difficulty in industrial production of SiC ceramics, etc., and achieves simple preparation process, high strength, convenient industrial production and applied effect

Inactive Publication Date: 2008-06-18
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its disadvantages are: 1. The reaction process belonging to free radical polymerization is easily affected by the dissolved substances in the system, resulting in oxygen inhibition, carbon inhibition, etc.
Therefore, there are still some difficulties in the industrial production of SiC ceramics prepared by gel casting.

Method used

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  • Preparation method of silicon carbide ceramic body for rubber mold

Examples

Experimental program
Comparison scheme
Effect test

example 11

[0043] Mix silicone rubber (106 room temperature vulcanized silicone rubber) with catalyst (dibutyltin dilaurate) and transfer agent (tetraethyl orthosilicate) evenly in a ratio of 100:3:3 (by mass). After degassing, it is poured into a container with a pre-replicated object for curing, the curing temperature is room temperature, and the curing time is greater than 24 hours. After curing, properly process the silicone rubber cured body, take out the pre-replicated object, and modify or further process the silicone rubber mold to meet the needs and geometric accuracy of slurry casting.

example 12

[0045] Mix components A and B of epoxy crystal glue (560) uniformly at a ratio of 2:1. After being removed, it is poured into a container with a pre-replicated object and solidified, the curing temperature is room temperature, and the curing time is greater than 24 hours. After curing, properly process the silicone rubber cured body, take out the pre-replicated object, and modify or further process the silicone rubber mold to meet the needs and geometric accuracy of slurry casting.

example 13

[0047] Mix the A and B components of polyurethane (QS-301) crystal glue evenly, and the ratio is 2:1 (mass). After degassing, it is poured into a container with a pre-replicated object for curing, the curing temperature is room temperature, and the curing time is greater than 24 hours. After curing, properly process the cured body of polyurethane crystal glue, take out the pre-replicated object, and modify or further process the mold of polyurethane crystal glue to meet the needs of slurry casting and geometric accuracy.

[0048] Epoxy resin is used as a gel system for SiC gel casting molding to prepare SiC ceramic body examples:

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Abstract

The invention relates to a method for preparing zirconium carbide ceramic body by using a rubber mold, which belongs to the field of ceramic-plastic molding. The invention is characterized in that the SiC ceramic body is prepared by utilizing the rubber mold. The water-soluble epoxy resin is taken as a gel system of SiC gel casting molding to prepare the SiC sizing agent which is fit for the gel casting molding, and then a fine and complex structure of molding substance can be reproduced directly by using the rubber mold. The method has the outstanding advantages that: the water-soluble epoxy resin gel system will not be inhibited by the mold material; the preparative body has a high strength and smooth surface without crack and surface shedding phenomena; the fine and complex Sic body can be prepared by using the soft and stretchy rubber mold, thereby the production cost and processing difficulty for the mold can be lowered.

Description

technical field [0001] The invention relates to a method for preparing a silicon carbide ceramic body used for a rubber mold, and belongs to the field of ceramic colloidal molding. Background technique [0002] Gelcasting is an important molding process for preparing SiC ceramics. Gel casting can obtain uniform green body structure, high green body strength and can be machined. The monomer used as the polymerization system is generally acrylamide or acrylic acid. The advantage is that the addition of the monomer can reduce the viscosity of the slurry system; the price is low. But its disadvantages are: 1. The reaction process belonging to free radical polymerization is easily affected by the dissolved substances in the system, resulting in oxygen inhibition and carbon inhibition. In order to overcome oxygen inhibition, the slurry must be cured in a closed container with an inert gas. This causes the complication of technology; 2, from the polymerization inhibition of mold...

Claims

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Application Information

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IPC IPC(8): C04B35/565C04B35/634C04B35/622
Inventor 董满江毛小建张兆泉刘茜
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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