Fig. 7

Shrinkage behaviour during hot pressing. a Shrinkage behaviour of the powders after 6 h of decantation and hot-pressed at 50 MPa and 1050 °C (Exp. #5). b Shrinkage behaviour of the powders after 24 h of decantation and hot-pressed without CAS conditions at 50 MPa and 1100 °C (Exp. #8). Inset indicates the shrinkage behaviour for the first 6 h. c Shrinkage behaviour of the powders after 24 h of decantation and hot-pressed with CAS conditions at 100 MPa and 1080 °C (Exp. #12). Inset indicates the shrinkage behaviour for the first 3 h. d Shrinkage behaviour in the experiment of preparing a green body by slip casting from the powders after 24 h of decantation and hot pressing with CAS conditions at 100 MPa and 1080 °C (Exp. #17). The shrinkage behaviour was manually recorded for the experiments shown in (a), (c) and (d), and the open circles indicate the recorded displacements