Abstract: The present invention relates to a heat-insulating material, in particular in the form of a solid foam, based on mineral particles of submicron porosity, this material incorporating two different ranges of porosities, advantageously including a first range consisting of (macro)pores with diameters of between 10 microns and 3 mm, and a second range consisting of submicron pores with diameters greater than 4 nm and less than 1 ?m, the pore volume of said submicron pores being at least 0.5 cm3/g and the mass per unit volume of said insulating material being less than 300 kg/m3.

Abstract: Process for manufacturing a thermally insulating material comprising the following steps: a) preparing an aqueous mixture of a solid mineral substance in suspension having a specific surface area S of greater than 5 m2/g; b) adding to the mixture at least one pore-forming agent; c) stirring so as to obtain a homogeneous mixture; d) preforming a substrate from the homogeneous mixture; e) optionally drying the substrate at least partially; f) removing, at least partially, the pore-forming agent; and such that said specific surface area S, expressed in m2/g and measured by BET, and the mean particle diameter Dpm of the pore-forming agents, expressed in micrometers and measured by dynamic light scattering, obey the relation: 1/S<Dpm<50/S.

Abstract: The present invention relates to a heat-insulating material, in particular in the form of a solid foam, based on mineral particles of submicron porosity, this material incorporating two different ranges of porosities, advantageously including a first range consisting of (macro)pores with diameters of between 10 microns and 3 mm, and a second range consisting of submicron pores with diameters greater than 4 nm and less than 1 ?m, the pore volume of said submicron pores being at least 0.5 cm3/g and the mass per unit volume of said insulating material being less than 300 kg/m3.

Abstract: Process for manufacturing a thermally insulating material comprising the following steps: a) preparing an aqueous mixture of a solid mineral substance in suspension having a specific surface area S of greater than 5 m2/g; b) adding to the mixture at least one pore-forming agent; c) stirring so as to obtain a homogeneous mixture; d) preforming a substrate from the homogeneous mixture; e) optionally drying the substrate at least partially; f) removing, at least partially, the pore-forming agent; and such that said specific surface area S, expressed in m2/g and measured by BET, and the mean particle diameter Dpm of the pore-forming agents, expressed in micrometers and measured by dynamic light scattering, obey the relation: 1/S<Dpm<50/S.