Abstract
The NASICON-type Na 1.5Nb 0.3Zr 1.5(PO 4) 3 was prepared by solid state reaction of Nb 2O 5 and the precursor γ-NaHZr(PO 4) 2 at 700 °C. The EPR spectra showed a signal with a g factor of 1.984 assigned to Nb (IV) species in octahedral oxygen environments. The X-ray powder diffraction pattern obtained with monochromatic radiation was indexed on the basis of a rhombohedral cell, the hexagonal parameters being a H = 8.8061(2) and c H = 22.7638(7) A ̊ . The Na + ion conduction was measured by the complex impedance method (frequency range: 0.1–10 5 Hz; temperature range: 20–500 °C) on four pellets previously sintered at 450, 750, 900 and 1000 °C. The conductivity data are discussed in relation to the sintering temperature. An activation energy of 0.60 eV for the movement of Na + ions in the NASICON framework has been found.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
