Question: A slip for tape casting contains, on a weight basis, 100 parts Al₂O_3, 10 parts nonvolatile organics, and 35 parts toluene. After drying, the adherent tape is 60% of the original thickness of the cast. Estimate the porosity of the tape after drying and after binder burnout. After sintering, there is a shrinkage of 7.5% in the thickness of the tape, and the relative density of the tape is 95.0 %. Estimate the linear shrinkage in the plane of the tape, assuming homogeneous shrinkage in the plane.