Abstract
The effect of the cation present in soluble silicates was investigated by studying the properties of lithium, sodium, and potassium silicates by thermal analysis, X-ray diffraction, and water absorption tests. Intumescence and solubility of the samples were found to be dependent on the strength of cationic cross-links between polysilicate particles. The degree of intumescence and solubility both decrease in the order K+ > Na+ > Li+. Ionic hydration was found to be the primary mechanism for the water absorption of the silicate samples. Si2O5 −2 crystalline regions were found to exist in potassium and lithium silicate samples.
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Langille, K.B., Nguyen, D., Bernt, J.O. et al. Mechanism of dehydration and intumescence of soluble silicates. J Mater Sci 26, 704–710 (1991). https://doi.org/10.1007/BF00588307
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DOI: https://doi.org/10.1007/BF00588307