Three stages of pressure were applied under dynamic vacuum at room temperature (~21±2 C) in a lab with ambient relative humidity in the range of ~50±20%. First, two lower pressure stages-35 MPa for ~1 hour and 150 MPa for ~2 hours-were used to produce an opaque green body ceramic (see Figure ). Then, finishing stage holding pressures between ~200 and 525 MPa were set for ~150-300 hours. Finishing stage pressures and press times depended on the thickness of the ceramic. In general, thicker ceramics required longer press times and higher pressure to achieve similar densities. After densification, perovskite ceramics were carefully removed from the die sets using a CARVER manual uniaxial press. Note perovskite ceramics are brittle and significant fracturing can occur upon removal so proceed with caution. All ceramics were characterized thereafter without any additional annealing or polishing steps. Ceramics were stored under vacuum in the dark when not being characterized. Finally, we note that in some cases (e.g., Figure ) a split-type die set (MSE) was used so ceramics could be removed characterized and reloaded onto the press for further densification.