Home > Publications database > Self-Healing Glass/Metakaolin-Based Geopolymer Composite Exposed to Molten Sodium Chloride and Potassium Chloride > print

001     1025443
005     20250203103125.0
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037 _ _ |a FZJ-2024-02895
082 _ _ |a 600
100 1 _ |a Keane, Patrick F.
|0 0000-0002-4494-9563
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245 _ _ |a Self-Healing Glass/Metakaolin-Based Geopolymer Composite Exposed to Molten Sodium Chloride and Potassium Chloride
260 _ _ |a Basel
|c 2023
|b MDPI
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520 _ _ |a Geopolymers (GP) are a class of X-ray amorphous, nanoporous, nanoparticulate materialsthat can be mixed, poured, and cured under ambient conditions. Typically, geopolymers are madeusing a Group 1 (G1) alkali activator such as sodium or potassium metasilicate and an aluminosilicateprecursor. An analogous material to GPs is ordinary Portland cement because of the similarities inprocessing, however, the resulting microstructure is more similar to that of a glass. Geopolymers aremore thermally stable than OPC and can therefore be used in a variety of thermal energy storagesystems, as energy storage is an increasing global concern. In this study, potassium metakaolin-basedgeopolymer composites containing glass particles and alumina platelets were manufactured, heatedin air, and exposed to molten sodium chloride or potassium chloride under an air atmosphere.Results showed the formation of an amorphous self-healing geopolymer composite (ASH-G) thatcould contain molten G1 chlorides for over 200 h without signs of macro or microscopic chemicaldegradation. The filling of cracks by glass particles in the composite after heating to 850 ◦C makes thismaterial self-healing. It was found that the morphology of ASH-G composites was more affected bytemperature and duration than contact with corrosive molten chlorides in air. Future works includeinvestigating the effect of molten salt on mechanical properties during initial heating, after prolongedheating, and the material compatibility with other molten Group 1 chloride eutectics.
536 _ _ |a 1243 - Thermal Energy Storage (POF4-124)
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700 1 _ |a Jacob, Rhys
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700 1 _ |a Belusko, Martin
|0 P:(DE-HGF)0
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700 1 _ |a Bruno, Frank
|0 0000-0002-1805-0036
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773 _ _ |a 10.3390/app13042615
|g Vol. 13, no. 4, p. 2615 -
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