Solid electrolytes with multivalent cation conduction. 1. Conducting species in MgZrPO4 system

Magnesium ion conducting materials have been found in the system MgZrPO4, and the composition of the material with maximum conductivity has been estimated to be MgZr4(PO4)6 having the same crystal structure as that of NaZr2(PO4)3. The conductivities are2.9 × 10−5 and 6.1 × 10−3Scm−1 at 400 and 800 °C, respectively and the activation energy for conduction is 79.5 kJ/mol. The charge carrier of this material has been confirmed to be magnesium ions by the Tubandt's method and the electron probe micro analysis.