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Porous Refractory Ceramics for High-Temperature Thermal Insulation - Part 2: The Technology Behind Energy Saving

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Interceram - International Ceramic Review

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.

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Acknowledgements

The authors acknowledge Brazilian Research Foundations FAPESP (2010-19274-5; 2017/06738-2; 2018/19773-3) and CNPq (305877/2017-8; 304081/2020-5) for supporting this research; and IBAR (Brazil), Skamol (Denmark), Almatis (Brazil and USA) for the samples of thermal insulators supplied. They are also indebted to the Electron Microscopy Laboratory of Advanced Materials Research Support Center (SMM/IFSC) for the SEM images. They declare that no competing interests (financial or personal) affected the results reported in this paper and that they cited all funding and supporting sources.

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Authors and Affiliations

  1. Materials Engineering Department, University of São Paulo, São Carlos, Brazil

    Rafael Salomão, Katherine Oliveira & Leandro Fernandes

  2. São Carlos, Brazil

    Paulo Tiba

  3. Consultoria e Projetos Ltda, São Roque, Brazil

    Ulisses Prado

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  1. Rafael Salomão
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Salomão, R., Oliveira, K., Fernandes, L. et al. Porous Refractory Ceramics for High-Temperature Thermal Insulation - Part 2: The Technology Behind Energy Saving. Interceram. - Int. Ceram. Rev. 71, 38–50 (2022). https://doi.org/10.1007/s42411-022-0483-2

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