Complex impedance analysis of RbNO3 and RbNO3:Al2O3 dispersed solid electrolyte systems

Complex impedance spectroscopic studies were carried out on RbNO3 and RbNO3-Al2O3 dispersed solid electrolyte systems (DSES) in the temperature range of 50 °C to 300 °C and the frequency 50 KHz to 1 MHz. Dielectric constant, loss tangent, and AC conductivity, in these systems are presented. Dielectric constant, loss and AC conductivity are found to increase with temperature and with mole percent of Al2O3. These dielectric properties are interpreted in terms of space charge polarization and increased concentration of defects in the interfacial layer formed between the host and the dispersoid.