抄録
MgO-ZnO solid solutions with different chemical compositions were prepared by heating at 1200oC for 5h in air. By XRD, a single phase of MgO was observed above the molar ratio (MgO/ZnO) of 1.86, of which the lattice constant increased linearly. Diffraction peaks corresponding to ZnO when the ratio was 1.22 were detected in addition to diffraction peaks of MgO. No change in lattice constant of MgO was recognized at the ratio of 1.22. Antibacterial characteristics towards Staphylococcus aureus and Esherichia coli were examined in four solid solutions by colony count method. In the results, antibacterial activity of MgO-ZnO solid solution was found to enhance with decreasing the molar ratio in the range from 9.00 to 1.86. At the ratio of 1.22, however, the antibacterial activity reduced. That is, antibacterial activity of the MgO-ZnO solid solution was found to be dependent on the chemical composition.
