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Method for recasting and reforming molded water-base casting film

A water-based casting and casting molding technology, applied in the field of casting molding technology, can solve the problems of recycling and utilization of water-based casting films, and achieve universality, easy control of conditions, cost and resource reduction. wasteful effect

Inactive Publication Date: 2008-01-09
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

Unfortunately, so far, there is no report on the recycling of water-based cast film

Method used

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  • Method for recasting and reforming molded water-base casting film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 100g of Al with an average particle size of 400nm 2 o 3 The powder was added to 25ml of water containing 2.0g of potassium polyacrylate (PAA-K) as a dispersant, and ball milled for 24h. 50 g of 12 wt % PVA solution and 7.2 g of 1,2-propanediol were added. Among them, the slurry binder / ceramic powder (X=0.06), plasticizer / binder (Y=1.2), (ceramic powder+binder+plasticizer) / solvent water (Z=1.64) . Continue ball milling for 24h, the slurry obtained 0 = 600 mPa·s. After the slurry is vacuum degassed, it is tape cast, and after natural drying, a cast film is obtained.

[0021] Put part of the cast film into the container, add a certain amount of water, and dissolve the cast film under strong stirring at 90-100°C, cool to room temperature, and ball mill for 12 hours to obtain a secondary slurry, and measure its viscosity η 1 = 600 mPa·s. The secondary slurry is vacuum-degassed and then tape-cast, and the vacuum degassing vacuum is 600-1000torr, and the secondary cast ...

Embodiment 2

[0023] 100g of Al with an average particle size of 400nm 2 o 3 The powder was added to 25ml of water containing 2.0g of potassium polyacrylate (PAA-K) as a dispersant, and ball milled for 24h. 50 g of 12 wt % PVA solution and 7.2 g of 1,2-propanediol were added. Among them, the slurry binder / ceramic powder (X=0.06), plasticizer / binder (Y=1.2), (ceramic powder+binder+plasticizer) / solvent water (Z=1.64) . Continue ball milling for 24h, the slurry obtained 0 = 600 mPa·s. The slurry was vacuum degassed and then tape casted for 30 minutes, and then naturally dried to obtain a cast film.

[0024] Put part of the cast film into the container, add a certain amount of water, and dissolve the cast film under strong stirring at 90-100°C, cool to room temperature, and ball mill for 12 hours to obtain a secondary slurry, and measure its viscosity η 1 = 580 mPa·s. The secondary slurry is vacuum-degassed, then tape-cast, and dried naturally to obtain a secondary cast film. The second...

Embodiment 3

[0026] 100g of Al with an average particle size of 400nm 2 o 3 The powder was added to 25ml of water containing 2.0g of potassium polyacrylate (PAA-K) as a dispersant, and ball milled for 24h. 58.3 g of 12 wt % PVA solution and 7.0 g of 1,2-propanediol were added. Among them, the slurry binder / ceramic powder (X=0.07), plasticizer / binder (Y=1.0), (ceramic powder+binder+plasticizer) / solvent water (Z=1.49) . Continue ball milling for 24h, the slurry obtained 0 =770mPa·s. After the slurry is vacuum degassed, it is tape cast, and after natural drying, a cast film is obtained.

[0027] Put part of the casting film into the container, add a certain amount of water, and dissolve the casting film under strong stirring at 90-100°C, cool to room temperature, and ball mill for 24 hours to obtain a secondary slurry, and measure its viscosity η 1 =760 mPa·s. The secondary slurry is vacuum-degassed, then tape-cast, and dried naturally to obtain a secondary cast film. The secondary me...

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Abstract

A secondary formation for formed water-based casting film is carried out by putting formed water-based casting film into container, adding into deionized water according to first slurry viscosity eta 0 and secondary slurry viscosity eta 1, dissolving while strongly agitating at 90-100 deg. C to form into cast slurry, cooling obtained slurry to room temperature, ball grinding, vacuum degassing at 600-1000 torr, casting, drying to obtain secondary casting film, optimizing for first slurry and controlling for secondary formation. It's easy, controllable and can be recovered and reutilized and it saves natural resources.

Description

technical field [0001] The present invention relates to a method for re-casting a formed water-based cast film, more precisely, reclaiming and re-forming (ie, secondary or multiple forming) a once-formed water-based cast film. Methods. That is to say, the present invention provides a method for preparing a repeatedly moldable ceramic water-based casting slurry. It belongs to the field of tape casting technology. Background technique [0002] The research and development of inorganic ceramic membrane materials has become one of the hot topics in the field of membrane science and technology. Tape casting is widely used to prepare circuit substrates, capacitors and multilayer ceramics, and has become a common method for preparing ceramic membranes. Suitable for large-scale industrial production. It has the advantages of simple process, low cost, and controllable film thickness. It is the main method for preparing flat ceramic materials with a thickness ranging from several m...

Claims

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Application Information

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IPC IPC(8): C04B35/622
Inventor 田汀江东亮张景贤林庆玲
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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