Structure and properties of strontium phosphate glasses modified with aluminum oxide applied as glass ionomer cement

Abstract

ABSTRACT. Studied glasses in the system 50P2O5-(49-x)SrO-1AlF3-xAl2O3 (mol%), 0≤x≤4.5, were prepared via the melt-annealing technique. The prepared samples are transparent amorphous network structures. Glasses are still transparent upon the heat treatment at 540 ºC for 4 hours. 27Al nuclear magnetic resonance (NMR) has been applied to determine the structural role of Al2O3. X-ray diffraction (XRD), Fourier transform infrared (FTIR), and Vickers hardness (Hv) measurements have been carried out. XRD spectroscopy is used to investigate the glasses' crystalline features. The crystallinity was enhanced via the heat treatment process. Some of investigated strontium phosphate glasses are recommended to be applied in dental applications.   KEY WORDS: NMR, Aluminum oxide, GIC, X-ray diffraction, Strontium phosphate   Bull. Chem. Soc. Ethiop. 2023, 37(3), 653-662.                                                             DOI: https://dx.doi.org/10.4314/bcse.v37i3.9