Optical properties of a low-temperature bioactive glass powders

Abstract

The bioactive glass powders have been synthesis by sol-gel method at low temperature. The silica used as the starting material in this study is silica purified from natural sand with mass variations for amorphous silica and phase variations (Quartz, amorphous). Analysis of the FTIR curves in samples BA1, BA2, BA3 and BQ showed that a lot of group bonds on Bioactive Glass had been formed for all samples. There are Si-O symmetric stretching functional groups (823-825 cm−1), Si-O-Si symmetric stretching functional groups (1047-1050 cm−1), PO4 functional groups (579-606 cm−1), as well as OH symmetry and asymmetry functional groups (3414-3435 cm−1). Meanwhile, the UV-Vis curve reveals the absorption of ultraviolet wavelengths in the range of 230-300 nm for all samples. Although the trend of sample density (BA1, BA2 and BA3) with the SiO2-amorphous starting material was indicated to decrease with the increase in mass, respectively 0.555 gram/cm3, 0.553 gram/cm3 and 0.543 gram/cm3, the highest density was achieved by the BQ sample of 0.563 gram/cm3. This density value is still higher than the density of bone tissue so that further synthesis is needed by adding an amorphous SiO2 starting material.