Abstract
A transparent mold with a window of a strengthened glass was devised. This mold enables to visualize the dynamic flow of the Si3N4 slurry through the glass window by VTR. A turbulent flow of the slurry was observed, when the flow rate increses abruptly. It was made clear that this turbulence gives rise to a lot of voids in the Si3N4 green compact, which result in low Weibull constant of bending strength of Si3N4 sintered body.
