Table 5.

Change in Density of Heated Samples Relative to the Reference Sample.

Temperature °C	23	105	150	200	300	400	600	800
Density [kg/m3]	1785.2	1768.2	1731.8	1593.8	1377.6	1264.3	1194	1169.3
Relative density	100%	99.1%	97%	89.3%	77.2%	70.8%	66.9%	65.5%