Effect of annealing temperatures on an ion transport properties of the bioglass

AC impedance spectroscopy has been used to investigate the dynamic process of ions in the network of the phosphate based bioglass of system containing 47P2O5–30.5CaO–21Na2O–1.5B2O3 and the effect of annealing temperatures on an ion transport properties of the bioglass. The highest conductivity has been found for the bioglass annealed at 873 K. The activation energy for hopping of the ions is lower than the dc activation energy which shows that part of the applied energy is utilized for charge carrier creation. The modulus analysis result shows that the dielectric phenomena have two relaxation mechanisms. Temperature independent dynamic process has also been observed in the bioglass system from imaginary modulus scaling.

► To understand the ion transport mechanism, ac impedance spectroscopy was used. ► Higher conductivity has been found for the bioglass annealed at 873 K. ► Higher carrier concentration has also been observed for the same system. ► Bioglasses show two relaxation mechanisms. ► Ion dynamic process is independent of temperature.