CSP sample CS_G1 was also subjected to dilatometric analysis, to evaluate post annealing. The dilatometry test was carried out with a heating rate of 10 °C/min up to 500 °C and then held at this temperature for 2 h. The sample CS_G1 further densified: the recorded curve (Fig. 5b) showed a trend similar to that of the G5 green samples pressed at 120 MPa and 500 MPa, but with a lower linear variation as the slope of the curve (i.e. the shrinkage rate) was less pronounced. CS_G1 had a total linear shrinkage of 2% after holding at 500 °C for 2 h. The final bulk density was 73%.