Abstract
Glasses of the SiO2–P2O5–K2O–MgO–CaO–B2O3 system acting as nutrients carriers in the soil environment were synthesised by the melt-quenching technique. Thermal properties were studied using DTA/DSC methods and the influence of B2O3 and P2O5 content on thermal stability and crystallization process of these glasses was examined. The structure of the glass network was characterized by FTIR, 31P, and 11B MAS NMR. The chemical activity of the glasses in the 2 mass% citric acid solution was measured by the ICP-AES method. The analysis indicated that the formation of P–O–B units with chemically stable tetrahedral borate groups decreases the glass solubility in conditions simulating the soil environment.
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Acknowledgements
The work was supported by the Grant No. N R08 0010 06 of the Ministry of Science and Higher Education of Poland. Magdalena Szumera PhD was supported by the START fellowship from The Foundation for Polish Science.
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Szumera, M., Wacławska, I. & Olejniczak, Z. Influence of B2O3 on the structure and crystallization of soil active glasses. J Therm Anal Calorim 99, 879–886 (2010). https://doi.org/10.1007/s10973-009-0550-1
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DOI: https://doi.org/10.1007/s10973-009-0550-1