New Journal of Glass and Ceramics

Volume 11, Issue 2 (April 2021)

ISSN Print: 2161-7554   ISSN Online: 2161-7562

Google-based Impact Factor: 1.75  Citations  

Effect of SrO on the Structure of Apatite and Wollastonite Phases of Na2O-CaO-SiO2-P2O5 Glass System

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DOI: 10.4236/njgc.2021.112003    396 Downloads   1,204 Views  Citations

ABSTRACT

Glasses in the system 24.5Na2O·24.5CaO·6P2O5·xSrO·(45-x)SiO2 have been studied in the composition region of x = 0 - 15 mol%. The as prepared glasses are transparent and have an amorphous network structure. On the otherhand, heat treated glasses are transformed to opaque white glass ceramic characterized by their highly crystalline network structure. Crystalline apatite (calcium phosphate, Ca3(PO4)2, wollastonite (calcium silicate, CaSiO3), and strontium calcium phosphate Ca2Sr(PO4)2 are the main well-formed crystalline species played the major role in material bioactivity. Increasing SrO leads to enhancing material crystallite and enhances the hardness of the host glass matrix. The change of XRD spectra, 31P NMR chemical shift and hardness number upon increasing SrO are considered due to modification of the apatit Ca(PO3)2 to involve Sr ions inducing Ca2Sr (PO4)2 apatite one. Such species play the role in enhancing material properties and hardness.

Share and Cite:

El Damrawi, G. , Ramadan, R. and El Baiomy, M. (2021) Effect of SrO on the Structure of Apatite and Wollastonite Phases of Na2O-CaO-SiO2-P2O5 Glass System. New Journal of Glass and Ceramics, 11, 45-56. doi: 10.4236/njgc.2021.112003.

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