Application of fluid mechanics concepts to ceramic tape casting.
01 January 1987
We studied the fluid flow behavior of a ceramic slurry during tape casting, which is an important forming process of multilayer capacitors and packages. Analytic expressions are derived for a ceramic slurry, with a Newtonian flow behavior, to determine the tape thickness as a function of viscosity, the pressure head, and the speed and geometry of the caster. Our theoretical predictions are verified by tape casting experiments using lead perovskite slurry to form ~ 60micron tapes at different casting velocities. The results show that within the range of normal operating conditions a uniform tape thickness can readily be achieved. Furthermore, it is feasible to achieve a high speed casting operation without any deleterious effect on the tape quality.