COMPOUND FORMATION AND CONDUCTIVITY IN THE SYSTEM NA2O-ZRO2-P2O5 - SODIUM ZIRCONIUM ORTHO-PHOSPHATES

The composition of the Na** plus ion conducting NASICON solid electrolyte was originally given as a solid solution series. The overall aim of the present work is to determine the phase diagram of the system Na//2O-ZrO//2-P//2O//5-SiO//2, especially in the region of the NASICON compositions. A knowledge of the phase diagram should confirm the correct composition(s) of NASICON. As a preliminary to this, the Na//2O-ZrO//ZrO//2-P//2O//5 system has been studied and results for the orthophosphate join NaZr//2P//3O//1//2-Na//3PO//4 are presented.