A new trivalent cation-conducting solid electrolyte, with a Nasicon-type structure, was synthesized by using a sol-gel method, and the trivalent cation-conducting properties were investigated. It was found that the trivalent-ion conductivity was comparable to that of trivalent ion-conducting tungstates with a Sc2(WO4)3-type structure. Its conductivity at 600C was equal to 1.06 x 10-4S/cm; which was 2.5 times as high as that of Al2(WO4)3. The migration of Sc3+ cations in the present material was demonstrated directly by means of direct-current electrolysis.

A New Trivalent Cationic Conducting Solid Electrolyte with Nasicon-Type Structure. S.Tamura, N.Imanaka, G.Adachi: Solid State Ionics, 2000, 136-137, 423-6