Matters needing attention when using alumina ceramic tiles

When the alumina ceramic tile is used, the powder needs to be sprayed and granulated, and polyvinyl alcohol is introduced as a binder, and a water-soluble paraffin is used as a binder for Al2O3 spray granulation, which has good fluidity under heating. , The powder after spray granulation must have good fluidity, loose density, flow angle friction temperature less than 30 ℃, ideal particle gradation ratio and other conditions, in order to obtain a larger green density, the molding method of alumina ceramic products has dry pressing , grouting, extrusion, cold isostatic pressing, injection, casting, hot pressing and hot isostatic pressing and other methods. In recent years, pressure filtration molding, direct solidification injection molding, gel injection molding, centrifugal grouting and solid free molding have been developed at home and abroad in recent years. Different product shapes, sizes, complex shapes and precision products require different molding methods.

Grouting is the earliest molding method used for alumina ceramic tiles. Due to the use of plaster molds, low cost and easy molding of large-sized and complex parts, the key to grouting is the preparation of alumina slurry, usually with water as the flux. Medium, then add debonding agent and binder, fully grind and exhaust, and then pour into the plaster mold. Due to the adsorption of water by the capillary of the gypsum mold, the slurry is solidified in the mold. During hollow grouting, when the mold wall absorbs the slurry to the required thickness, the excess slurry needs to be poured out. In order to reduce the shrinkage of the green body, a high-concentration slurry should be used as much as possible.

When the alumina ceramic tile is used, the powder needs to be sprayed and granulated, and polyvinyl alcohol is introduced as a binder, and a water-soluble paraffin is used as a binder for Al2O3 spray granulation, which has good fluidity under heating. , The powder after spray granulation must have good fluidity, loose density, flow angle friction temperature less than 30 ℃, ideal particle gradation ratio and other conditions, in order to obtain a larger green density, the molding method of alumina ceramic products has dry pressing , grouting, extrusion, cold isostatic pressing, injection, casting, hot pressing and hot isostatic pressing and other methods. In recent years, pressure filtration molding, direct solidification injection molding, gel injection molding, centrifugal grouting and solid free molding have been developed at home and abroad in recent years. Different product shapes, sizes, complex shapes and precision products require different molding methods.

Grouting is the earliest molding method used for alumina ceramic tiles. Due to the use of plaster molds, low cost and easy molding of large-sized and complex parts, the key to grouting is the preparation of alumina slurry, usually with water as the flux. Medium, then add debonding agent and binder, fully grind and exhaust, and then pour into the plaster mold. Due to the adsorption of water by the capillary of the gypsum mold, the slurry is solidified in the mold. During hollow grouting, when the mold wall absorbs the slurry to the required thickness, the excess slurry needs to be poured out. In order to reduce the shrinkage of the green body, a high-concentration slurry should be used as much as possible.