Fabrication of sol-gel derived new quaternary silicate Bioglass S55P4

Bioactive glasses with various compositions were widely applied in biomedical application such as bone fixing applications, dental applications and tissue engineering. S55P4 (55%SiO2–22%Na2O–19%CaO–4%P2O5) as quaternary glass system was prepared by sol-gel method. This synthesized glass was analyzed using X-ray Powder Diffraction (XRD), Scanning Electronic Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR). XRD results indicate that the amorphous structure with broad peak between 26° and 35° appeared in this new composition of sol-gel bioactive glass. Moreover, the signal at 2θ∼33° became sharper and more intense for longer soaking times corresponds to the apatite structure. SEM images revealed that the formation of carbonated hydroxyl apatite layer (CHA) with finer grains. FTIR spectra pointed out that the split peak of P-O bonding at approximately 570 cm−1 after soaking: the most characteristic region for apatite. This indicates the presence of crystalline calcium phosphates including carbonated hydroxyl apatite layer (CHA).