In various types of biomaterials used worldwide today, bioglass is one of the most interesting and a useful choice for research as it is unharmful or nontoxic to biological tissue. Binary or ternary phosphate-based glasses are also good candidates to be improved and used effectively. Glasses with 40 – 60 mol% of P2O5 incorporated at a constant mole-ratio of CaO: Na2O are studied in this experiment. Each batch of glasses is melted in an electric furnace at a temperature of about 1000 °C and splat-quenched at room temperature. Electrical properties such as conductivity and dielectric constant and microstructures of these glasses were investigated.