Freeze-Drying Granulation of Non-Aqueous Nitride Slurry

Abstract

To apply the spray freeze granulation drying technique for nitride fabrication, we prepared silicon nitride slurries using a mixture of tert-butyl alcohol and cyclohexane as a solvent and attempted to understand the internal structural changes of the slurries by observing their freezing behavior. In addition, the ceramics were prepared using granules obtained via the spray freeze granulation drying method. It was found that the microstructures of the freeze-dried bodies differed depending on the solvent mixture ratio and the structure of the organic additive.