New types of light-weight refractory and heat-insulation materials for long-term use at extremely high temperatures

The particulars of a technology for new types of refractory and heat-insulation materials with high porosity, which are obtained by duplicating the cellular structure of the polymer base (polyurethane foam) and using pore-forming technology based on “cold” swelling of inorganic compositions, are examined. The use of electrocorundum, periclase, spinel, and zirconium dioxide as a base permits using such materials from 1750 to 2200°C. In a number of cases the heat-insulation materials which have been developed can successfully replace corundum fiber materials.