The conductivity was measured at 400 to 900C and 1000 to 1300C, and the conduction mechanism was found to be different in the 2 temperature ranges. Solid solutions of the form, Si3N4-Ca3N2, exhibited a high ionic conductivity between 400 and 900C.

Electrochemical Properties of Nitride Phases in the Si3N4-Ca3N2 and Si3N4-AlN-Ca3N2 Systems. S.F.Palguev, R.P.Lesunova, E.I.Burmakin, E.S.Korovenkova: Inorganic Materials, 2001, 37[7], 684-7