| abstract |
A solid electrolyte based on magnesia-doped ceria is described, having a composition represented by general formula Ce 1-x-y M x Mg y O 2-d , wherein M stands for Y, Ca or Sr, and the ranges of x and y are defined by the inequalities of 0.01≦x<0.3, 0.01≦y≦0.6 and 0.02≦x+y≦0.7. The composition can be formed into a sintered body suitably used as an oxygen-ion conducting solid electrolyte of an intermediate-temperature solid oxide fuel cell or other electrochemical devices. The solid electrolyte with suitable values of x and y have low cost, high stability and acceptable ionic conductivity as compared with similarly prepared Gd-doped ceria electrolyte. |