Method for recasting and reforming molded water-base casting film

[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 se

[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

[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 fil