Journal of Pure and Applied Ultrasonics

G. Rajkumar ¹, C. Manjula ¹, K. Sakthipandi ²

Affiliations
1 Department of Physics, Easwari Engineering College, Chennai-600 089,, IN
2 Department of Physics, SRM TRP Engineering College, Tiruchirappalli-621 105,, IN

Abstract

In this study, ultrasonic velocity measurement was used to explore the impact of strontium oxide on 45P2O5– 27CaO–3CaF2–(20 x)Na2O–xSrO fluorophosphates glasses. These glasses with different compositions of strontium oxide (x = 0, 2.5, 5, 7.5 and 10 mol%) have been prepared employing the customary melt quench technique. In order to explore the biocompatibility to optimize the composition of the prepared fluorophosphates glasses, a series of experimental studies such as SEM, XRD and ultrasonic studies have been made on prepared fluorophosphates glasses. The ultrasonic measurement was used to calculate the elastic moduli, stiffness constant and micro-hardness of the prepared fluorophosphates glasses. An increase in elastic constants from x = 0 to x = 7.5 mole % and further decrease with increase in SrO content was noticed. The above observations indicate the existence of structural property changes at this particular composition. In addition, XRD spectra reveal the presence of hydroxyapatite and fluorapatite crystalline peaks in all glass samples. SEM figures ensure the rich formation of hydroxyapatite and fluorapatite layer in the sample containing 7.5 mole% of SrO content.

Keywords

Fluorophosphate Glasses, Ultrasonic Velocity Measurement, Microhardness, Structural Properties.

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