Abstract
Three bio-phosphate glass-specimens with and without Al 2O 3 addition were prepared in order to shed light on their bioactivity behavior towards the simulated body fluid biological solution (SBF). The results revealed that Al 2O 3 has significant effect on the ability of bio-glass to form the hydroxycarbonate apatite layer on its surface. That layer was detected by FTIR spectra, SEM micrographs and EDAX pattern. Also, the effect of Al 2O 3 on the mechanical properties was studied by measuring the hardness of the glass samples, which increased by Al 2O 3 addition. The thermal expansion coefficient was decreased by increasing the Al 2O 3 percent in the bio-glass samples.
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