625395.fig.0010
Figure 10: Evolution of (black lozenges) and (white squares) thermal conductivities with time. The and are calculated from the curve slope measured in the and intervals (Figure 9). According to the drastic increase the values decrease from 0.9 to 0.2 W/mK during the 20 first days. The shows dispersive values around 0.97 W/mK.