METHOD FOR PREPARING AN INSULATING MATERIAL

摘要

The invention relates to a method for manufacturing a thermally insulating material, including the following steps: a) preparing an aqueous mixture of a solid inorganic substance in a suspension, having a specific surface S of greater than 5 m2/g; b) adding at least one pore-forming agent to the mixture; c) agitating the mixture in order to obtain a homogeneous mixture; d) preforming a substrate from the homogeneous mixture; e) optionally, at least partially drying the substrate; f) at least partially removing the pore-forming agent, such that said specific surface S, expressed in m2/g and measured by the BET method, and the mean particle diameter Dpm of the pore-forming agents, expressed in micrometres and measured by the dynamic diffusion of light, comply with the following relation: 1/S < Dpm < 50/S.