| abstract |
The invention relates to a method for producing an aerogel material with a porosity of at least 0.55 and an average pore size of 10 nm to 500 nm, having the following steps: • a) preparing and optionally activating a sol; • b) filling the sol into a casting mold (10); • c) gelling the sol, whereby a gel is produced, and subsequently aging the gel; at least one of the following steps d) and e), • d) substituting the pore liquid with a solvent; • e) chemically modifying the aged and optionally solvent-substituted gel (6) using a reaction agent; followed by • f) drying the gel, whereby the aerogel material is formed. The casting mold used in step b) is provided with a plurality of channel-forming elements (2) which are designed such that the sol filled into the casting mold lies overall at a maximum distance X from a channel-forming element over a specified minimum length L defined in the channel direction of the elements, with the proviso that X < 15 mm and L/X > 3. |