The other approach to investigate the effect of the heating
conditions on the sample relies on the measurements of the sample
deformation, caused by the presence of the volatile gas. The
experimental test was utilized a TMA to detect the deformation
on the surface of the sample (0.5 cm × 0.5 cm × 0.5 cm). Fig. 6
shows the distribution of the TMA probe position at the cubic
center as a function of the heating temperatures for different
heating rates. A larger deformation was observed as the heating
rate increased. For example, the strain distribution appeared significant
for the case of heating rate at 10 K min−1 between 400
and 500 K. After 500 K, the position of the probe sensor is dramatically
dropped to negative values for all of the cases. This
reveals that the ceramic powders surrounding by the organic
additives removed thermally were relocated and occupied the
available empty space where the additives were removed during
the thermal treatment