Fig. 1. Photo of 0.6 mg/cm³ silica aerogels

Fig. 2. Schematic illustration of ordinary density and ultra-low density SiO₂ aerogel

Fig. 3. SEM, TEM images and the contact angle value of 0.6 mg/cm³ silica aerogels

Fig. 4. FTIR spectrum and XRD pattern of 0.6 mg/cm³ silica aerogel

Fig. 5. N₂ adsorption/desorption isotherms and pore size distributions of 0.6 mg/cm³ silica aerogels