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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  • Abstract
  • Description
  • Claims
  • Application Information

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

Examples

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Example Embodiment

[0019] Example 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 dispersant potassium polyacrylate (PAA-K) and ball milled for 24h. Add 50g of 12wt% PVA solution and 7.2g of 1,2-propanediol. Among them, the binder of the slurry / 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 obtained slurry η 0 =600mPa·s. The slurry is vacuum degassed and then cast to shape, and a cast film is obtained after natural drying.

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

Example Embodiment

[0022] Example 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 dispersant potassium polyacrylate (PAA-K) and ball milled for 24h. Add 50g of 12wt% PVA solution and 7.2g of 1,2-propanediol. Among them, the binder of the slurry / 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 obtained slurry η 0 =600mPa·s. The slurry is vacuum degassed and then cast into shape. The vacuum degassing time is 30 minutes. After natural drying, a cast film is obtained.

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

Example Embodiment

[0025] Example 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 dispersant potassium polyacrylate (PAA-K) and ball milled for 24h. 58.3g of 12wt% PVA solution and 7.0g of 1,2-propanediol were added. Among them, the binder of the slurry / 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 obtained slurry η 0 =770mPa·s. The slurry is vacuum degassed and then cast to shape, and a cast film is obtained after natural drying.

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

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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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