Abstract
The micro- and nanostructure of materials resulting from mechanochemical interactions of natural diopside (CaMgSi2O6) and synthetic perovskite (CaTiO3) with CO2 have been studied by transmission electron microscopy (TEM) and high-resolution TEM. The results indicate that CO2 absorption is accompanied by CO2 “dissolution” in the form of CO 2−3 ions in the structurally disordered silicate or titanate matrix. The diopside activation product is a quasi-homogeneous amorphous carbonate-silicate phase. The mechanically activated perovskite is a nanocomposite consisting of CaTiO3 nanocrystals embedded in a carbonated amorphous titanate matrix.
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Original Russian Text © A.M. Kalinkin, V.N. Nevedomskii, E.V. Kalinkina, 2008, published in Neorganicheskie Materialy, 2008, Vol. 44, No. 6, pp. 727–733.
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Kalinkin, A.M., Nevedomskii, V.N. & Kalinkina, E.V. Nanostructure of CaMgSi2O6 (Diopside) and CaTiO3 (Perovskite) mechanically activated in carbon dioxide. Inorg Mater 44, 635–640 (2008). https://doi.org/10.1134/S0020168508060162
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DOI: https://doi.org/10.1134/S0020168508060162