In vitro study, structural and electrical characterization of alkali containing phosphoborate bioactive material

Material with a composition 7P2O5.19CaO.24Na2O.50B2O3 (mol%) was synthesised using the melt quenching technique. In vitro experiment was performed by immersing the sample in 0.02 M phosphate solution at 37 degrees C. Sample was structurally characterised using X-ray Diffraction (XRD), field emission scanning electron microscope (FESEM) with energy-dispersive X-ray spectroscopy (EDS) & Infrared (IR) spectroscopy, for analytical purpose dielectric measurements and ac conductivity were carried out. XRD profiles confirmed the ceramic nature of as-prepared sample and depicted the formation of hydroxyapatite (HAp) after immersion in the phosphate solution. FTIR spectra revealed the existence of borate and phosphate units. Dielectric constants e0, e00 and tan d were found to exhibit similar trends and all decrease with increase in frequency. Impedance spectroscopy and modulus analysis revealed nonDebye type relaxation phenomena. The complex impedance curves (Z' (x) vs Z00 (x)) for the sample were plotted and found to exhibit compressed semicircles indicating a single conduction mechanism and ac conductivity behavior was also examined on the basis of Jonscher's power law.Copyright (c) 2022 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of the 6th International Conference on Recent Advances in Material Chemistry (ICRAMC-2022).

Automated summary

The material with a composition of 7P2O5.19CaO.24Na2O.50B2O3 (mol%) was synthesized using the melt quenching technique. In vitro experiments were conducted by immersing the sample in a phosphate solution. The structural characterization, dielectric measurements, and ac conductivity analysis were performed, revealing the ceramic nature of the sample and the formation of hydroxyapatite after immersion in the phosphate solution.