Applied Chemical Engineering

Chemical stability and structural changes in xNa2O-(45-x) B2O3-45P2O5-10MnO glasses influenced by Na2O

OUMAIMA BARZALI

Laboratoire de Chimie Appliquée des Matériaux, Department of chemistry, Faculty of Sciences, Mohammed V University in Rabat, Avenue Ibn Battouta, BP 1014, Rabat, Morocco

ABDELKADER BEN ALI

Laboratoire de Chimie Appliquée des Matériaux, Department of chemistry, Faculty of Sciences, Mohammed V University in Rabat, Avenue Ibn Battouta, BP 1014, Rabat, Morocco

JAMAL MABROUKI

Laboratory of Spectroscopy, Molecular Modeling, Materials, Nanomaterial, Water and Environnement, Department of chemistry, Faculty of Sciences, Mohammed V University in Rabat, Avenue Ibn Battouta, BP 1014, Rabat, Morocco

MOHAMED SAADI

Laboratoire de Chimie Appliquée des Matériaux, Department of chemistry, Faculty of Sciences, Mohammed V University in Rabat, Avenue Ibn Battouta, BP 1014, Rabat, Morocco

DOI: https://doi.org/10.59429/ace.v8i2.5633

Keywords: borophosphates, chemical durability, XRD, density, sodium oxide, manganese oxide

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Abstract

Borophosphate glasses with compositions xNa₂O-(45-x) B₂O₃-45P₂O₅-10MnO, where x ranges from 5 to 25 mol%, have been prepared using the conventional melt quenching technique. Several methods including X-ray diffraction, Fourier transform infrared spectroscopy (FTIR), and differential scanning calorimetry (DSC) have been used to characterize the produced materials. The absence of crystalline structure in the prepared phosphate glasses was confirmed by X-ray diffraction (XRD) studies. The chemical resistance of these glasses increases with the Na₂O content. Glasses containing more than 15 mol% Na₂O have excellent chemical resistance. The relationship between structural changes and composition was investigated by measuring density and glass transition temperature Tg. The results obtained show that the glass transition temperature and chemical properties increase with increasing sodium oxide composition in all the glasses studied. These experimental results indicate that Na₂O lowers the melting point and increases the strength of the glasses.

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