Table 1.

Physical properties of silica xerogels for each aging condition.

Aging condition	Surface area [m2/g]	Pore volume [cm3/g]	Average size pore [nm]
100 kHz, 6h	677	3.53	29.8
500 kHz, 6h	649	3.88	51.6
standing, 6h	652	2.97	22.4