B2O3–P2O5–CaO bioactive glasses: Synthesis, physical properties, optical basicity, electronegativity and radiation attenuation competence
Hanan Al–Ghamdi, Norah A. M. Alsaif, A. A. El-Hamalawy, Emad M. Ahmed, M.S. Sadeq, Y. S. Rammah
Abstract
Seven bioactive glasses in the system (50-x) B 2 O 3 –4P 2 O 5 –26CaO–20Na 2 O-xZnO: (x = 0–15 mol%) have been produced using melt quenching route. The prepared samples coded as BG1-BG7. The physical properties, average optical basicity , electronegativity , electronic polarizability , and radiation attenuation competence of the BG1-BG7 glasses have been examined. Non-crystalline state of samples confirmed via the XRD measurements. Density increased from 2.6274 g/cm 3 to 2.9406 g/cm 3 for BG1 to BG7 samples. The average optical basicity ( ˄ t h ) changed from 0.748 to 0.838, electronic polarizability, ( α 0 − 2 ) enhanced from 1.812 to 2.008, while electronegativity , ( χ a v ) reduced from 2.352 to 2.245 as ZnO increased from 0 to 15 mol%. The BG1 sample possessed the lowest values of both mass (MAC) –linear (LAC) -attenuation coefficients, while BG7 possessed the highest values. The sample contains higher ratio of ZnO (BG7) possessed the lowest values of half-value layer (HVL) and mean free path (MFP) among all BG-samples. Also, the HVL and MFP of all BG-samples were less than that of ordinary concrete (OC). The proposed bioactive samples can apply for several of medical applications.