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Mixed initiating system for increasing the stability of gelatin casting molding ceramic slurry and use method thereof

A technology of initiating system and pouring molding, which is applied in the direction of chemical instruments and methods, ceramic products, ceramic molding machines, etc., can solve problems such as agglomeration, and achieve the effect of easy control and simple process

Active Publication Date: 2009-08-26
中国科学院上海硅酸盐研究所苏州研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is to say, the present invention provides a mixed initiation system to solve the common agglomeration phenomenon of gel-casting slurry, ensure the stability of the gel-casting slurry before casting, and prepare gel-casting with uniform structure and high performance at low cost. Biscuit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016]The monomer 1 acrylamide was dissolved in deionized water to make a 15wt% solution, and the cross-linking agent N,N'-methylenebisacrylamide (MBAM) was added. The ratio of crosslinking agent to monomer is 1:6. Mix for 30 minutes to obtain a clear master mix. Then add the dispersant tetramethylammonium hydroxide (TMAH), the content of which is between 0.5-1wt% of the silicon carbide powder. Then add silicon carbide powder, ball mill or mix for 24 hours to obtain a slurry with a solid content of about 50vol%, and the viscosity of the slurry is about 300-600mPa.s. Then add mixed initiation system, wherein the addition of mixed initiation system is the 0.02-0.05wt% of premix (mixed initiation system comprises deionized water, initiator, monomer 2 and organic amine. Adopt azo[2-(2- Imidazolin-2-yl)] propane hydrochloride (AZIP 2HCl) is initiator, and the concentration in aqueous solution is 5wt%.Acrylamide is monomer 2, and the mol ratio of initiator is at 0.5: 1-1 : betwee...

Embodiment 2

[0018] The monomer 1N,N-dimethylacrylamide was dissolved in deionized water to make a 15wt% solution, and the cross-linking agent N,N'-methylenebisacrylamide (MBAM) was added. The ratio of crosslinking agent to monomer is 1:10. Mix for 30 minutes to obtain a clear master mix. Then add the dispersant tetramethylammonium hydroxide, the content is between 0.5-1wt% of the boron carbide powder. Then add boron carbide powder, ball mill or mix for 24 hours to obtain a slurry with a solid content of about 57vol%, and the viscosity of the slurry is about 400-600mPa.s. Then add the mixed initiation system, wherein the addition of the mixed initiation system is 0.02-0.1wt% of the premix (the mixed initiation system includes deionized water, initiator, monomer 2 and organic amine. Adopting ammonium persulfate (APS) as the initiator Agent, the concentration in aqueous solution is 20wt%.N, N-dimethylacrylamide is monomer 2, and the mol ratio of initiator is between 1:1-1.5:1.PEI is organi...

Embodiment 3

[0020] The monomer 1 methacrylamide was dissolved in deionized water to make a 15wt% solution, and the cross-linking agent N,N'-methylenebisacrylamide (MBAM) was added. The ratio of crosslinking agent to monomer is 1:15. Mix for 30 minutes to obtain a clear master mix. Then add the dispersant polyethyleneimine (PEI), the content of which is between 1-2wt% of the silicon nitride powder. Then add silicon nitride powder, ball mill or mix for 24 hours to obtain a slurry with a solid content of about 50vol%, and the viscosity of the slurry is about 300-600mPa.s. Then add the mixed initiation system, wherein the addition of the mixed initiation system is 0.05-0.08wt% of the premix (the mixed initiation system includes deionized water, initiator, monomer 2 and organic amine. Ammonium persulfate (APS) is adopted as the initiator Agent, the concentration in aqueous solution is 10wt%.Methacrylamide is monomer 2, and the mol ratio of initiator is between 1:1-2:1.Ethylenediamine is orga...

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Abstract

The invention relates to a mixed initiating system for increasing the stability of gelatin casting molding ceramic slurry and a use method thereof. The mixed initiating system comprises four components: in particular, deionized water, common used initiating agent, common used monomer and organic amine. The conventional gelatin casting molding technique can prepare stable ceramic slurry with about50-60 vol% of solid content and 300-600mPa.s of viscosity. The gelatin casting biscuit with uniform and compact structure can be obtained by further curing the ceramic slurry. The mixed initiating system can obtain the slurry with good stability, can prepare oxide and non-oxide ceramic materials with low cost, high performance and complex shape, and is suitable for the preparation of blocks or porous ceramics. And the technical process thereof can be easily realized.

Description

technical field [0001] The invention relates to a mixing initiation system and a using method for improving the stability of gel-casting ceramic slurry. The invention belongs to the preparation technology and application field of ceramics. Background technique [0002] With the development of modern science and technology, the advanced preparation technology of high-performance ceramic components has become one of the focus and hot spots of research, especially the preparation technology of large-sized and complex-shaped products. Ceramic materials are not only prone to defects during the molding process, but also the formed defects are often difficult to make up and eliminate through subsequent processes. In addition, the high hardness and high wear resistance of ceramic materials make subsequent processing difficult and expensive. For products with complex shapes, the processing problem is particularly difficult. Therefore, molding technology, as a key link in the prepar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/624C04B38/00B28C1/04B28C1/06B28B1/14
Inventor 张景贤陈碧钦江东亮林庆玲陈忠明黄政仁
Owner 中国科学院上海硅酸盐研究所苏州研究院
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