Electrical and Dielectric Characterization of Na 0.5 Li 0.5 Zr 2 (PO 4 ) 3

Abstract Na 0.5 Li 0.5 Zr 2 (PO 4 ) 3 has been synthesized by solid state reaction and characterized by thermogravimetry/ differential thermal analyses (TGA/DTA) in the temperature range 300 -1573 K. X-ray diffraction measurements have been carried out to determine the phase of the composition and scanning electron microscopy (SEM) for microstructure evaluation. Impedance spectroscopy at different temperatures (310 -600 K) and frequencies (300 kHz -1 GHz) have been carried out and the dielectric relaxation behaviour was determined under the same conditions. A dc conductivity maximum value of 0.25 S/m at 580 K was observed. However, the mixed alkali effect was not observed. The material exhibited relaxation behaviour with a peak in the dielectric permitivity ' at 469 K. There were no structural transformations observed