Ceramics Industry - Videos
Producing a ceramic slurry in a speed mixer
A slurry formulation with 75 parts Al2O3 and 25 parts water gives a highly viscous paste. If the formulation contains additionally one part liquefier (wetting and dispersing additive), this drastically improves the wetting and dispersing of the solid particles and produces a low-viscosity slurry. Grinding in the presence of zirconium oxide grinding beads optimizes the dispersion and results in an agglomerate-free slurry.
Preparation of a ceramic press granulate
A liquefier is used to produce a low-viscosity ceramic slurry from aluminum oxide and water (speedmixer, with grinding beads).
The grinding beads are separated by filtration and then defoamer, binder and pressing agent are added whilst stirring. By spray drying the press granulate is produced from the liquid slurry and a cyclone separates the coarse particles.
A press is used to manufacture the green body from the press granulate.
Producing a ceramic tape on a casting line
The ceramic slurry is fed to the casting line using a special pulsation-free pump and is then applied onto a carrier foil using a wide slot nozzle. The wet slurry film runs through a drying zone and is then wound up.
The ceramic tape can easily be separated from the carrier foil. A typical application example of ceramic tapes are multi-layer ceramic capacitors (MLCC) which are widely used on modern electronic circuit boards.