Study of the Effect of Calcium Substitution by Magnesium in the Vitreous System 3P2 O5 -2K2 O-(1 - x) CaO-x MgO

Materials
Tariq LabbiltaLoubna Abielaala

Abstract

Phosphate glasses have potentially interesting properties that can be used in various applications. Recently, different studies are focusing on their dissolution behaviours that can be modified to suit some environmental applications, such as controlled-release fertilisers. In this work, magnesium had been suggested to improve the glass durability of 3P2O5-2K2O-(1 - x)CaO-xMgO glasses (0 ≤ x ≤ 1). Indeed, its effect on glass structure, thermal properties and most important dissolution behaviours were studied, in order to evaluate their suitability of being used as controlled-release fertilisers. Various compositions in which calcium was partially replaced by magnesium were prepared by melting at 800 °C. The samples were characterised by differential scanning calorimetry, density measurements, X-Ray diffraction, FTIR spectroscopy and Raman spectroscopy. The dissolution behaviours were investigated using inductively coupled plasma optical emission spectrometry ICP-OES, pH measurements and SEM. Substitution of calcium by magnesium reduced the glass density, owing to the lower atomic weight of magnesium compared to calcium, and caused an increase in glass transition and crystallisation temperatures. Magnesium substitution significa...Continue Reading

References

Dec 7, 2007·Journal of Materials Science. Materials in Medicine·Ensanya Ali Abou NeelJonathan Campbell Knowles
Jan 17, 2019·International Journal of Molecular Sciences·Maria KaradjianFabian Westhauser
Nov 14, 2019·Journal of Applied Biomaterials & Functional Materials·Azizeh-Mitra Yousefi

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Citations

Jul 3, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Tariq LabbiltaMohamed Mesnaoui

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Methods Mentioned

BETA
X-ray
differential scanning calorimetry
infrared spectroscopy

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