Abstract—
It has been shown that two competing processes occur in a system of water glass (WG) silicates and [BnXn]2– (n = 10, 12; X = H, Cl) boron cluster anions (WG/[An]) in the range 100–200°C: the formation of a supramolecular structure due to cation–anion contacts of the silanol groups of the silicate with [An]'s at t ≤ 100°C and the condensation of the silanol groups of the silicate, resulting in the formation of polysiloxane chains (t ≥ 180°C). The difference in temperature conditions between these processes leads to inhibition of the silicate condensation process. The detailed structure of the silicate component of the WG/[An] systems has been studied as a function of [An] content.
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Funding
This work was supported by the Presidium of the Russian Academy of Sciences (basic research program no. 35: Scientific Principles of Producing Novel Functional Materials) and the Russian Federation Ministry of Science and Higher Education (state research target, theme no. 45.11, 0082-2014-0009, AAAA-A17-117040610309-0).
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Skachkova, V.K., Malinina, E.A., Goeva, L.V. et al. Polycondensation of Water Glass Sodium Silicates in the Presence of [BnXn]2– (n = 10, 12; X = H, Cl) Boron Cluster Anions. Inorg Mater 56, 657–661 (2020). https://doi.org/10.1134/S0020168520060138
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DOI: https://doi.org/10.1134/S0020168520060138