Thermal Insulating Materials

摘要: In this section, some classifications of porous thermal insulation materials are given and different techniques for porosity investigation described. Special attention is focused on the standard contact porosimetry, which provides no destruction samples gives a possibility to determine pores in wide diapason sizes. Owing these advantages, technique allows us research evolution structure at stages product preparation identify synthesis phase, when functional properties material transformed diametrically opposite ones. Effect such as conductivity compression strength estimated, appropriated correlations represented. The information dealt given, heat transfer through media considered. It noted, that main way reduce increase material, contribution solid phase can be diminished by manner. This principle used manufacture most insulators widespread polymer inorganic foams. They characterized extremely low conductivity, order magnitude 10−2 10−1 W m−1 K−1, respectively. Modern approaches development new insulating structures These based decrease gaseous phase. minimize fluid contribution, inert gases, lower comparison with air, encapsulated closed pores. Other ways degassing their pore sizes, simultaneously high has provided.