01-04-2022 | Research and Development
Porous Refractory Ceramics for High-Temperature Thermal Insulation - Part 2: The Technology Behind Energy Saving
Rafael Salomão, Katherine Oliveira, Leandro Fernandes, Paulo Tiba, Ulisses Prado
Interceram - International Ceramic Review
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Abstract: Porous refractory ceramics combine the high thermomechanical and chemical resistances of oxide-based compounds with the low thermal conductivity and specific heat of porous materials. This two-part study is devoted to understanding and critically reviewing their outstanding behavior as thermal insulators for high-temperature industrial processes (200-2000 °C). The first part (Interceram, v. 70, n. 03, 2021, p. 38-45, "The Science Behind Energy Saving") provided a compilation of updated information on thermal energy consumption per area of human activity and examples of industrial processes that occur in each temperature range. This second part presents classification criteria for insulators established according to their thermomechanical properties, installation method, microstructure, and temperature at use, analyses of some important grades of porous insulators, and the most common causes of premature failure.