VERFAHREN ZUR HERSTELLUNG VON MIT KERAMISCHEN PULVERN UND OXIDISCHEN SINTERADDITIVEN GEFUELLTEN MASSEN AUS THERMOPLASTISCHEN KUNSTSTOFFEN

摘要

For producing thermoplastic pastes filled with ceramic powders and oxidic sintering additives, the thermoplastics are introduced into a mixing section consisting of a plurality of zones. The thermoplastics are melted in a first zone. In the subsequent second zone, the molten plastic is mixed with an added suspension of a ceramic powder in an organic solvent containing dissolved hydrolysable precursor compounds of the oxidic sintering additives, the precursor compound is hydrolysed in the third zone by addition of water, and the solvent and volatile hydrolysis products are distilled off under a reduced pressure in the fourth zone. In the fifth zone, the melt containing the ceramic powder is compressed and extruded. …The process is suitable for producing thermoplastic pastes filled to the extent of 40 to 80 % by volume with ceramic powders.