Ceria based solid electrolytes

Details Ceria based solid electrolytes Ceria based solid electrolytes

C - Chemistry, Metallurgy

01

F

C01F 17/00 (2006.01) B01D 53/32 (2006.01) C01G 23/00 (2006.01) C25B 1/00 (2006.01) H01M 8/12 (2006.01) C25B 9/00 (2006.01)

Patent

CA 2382990

The present invention relates to compositions of matter represented by the general formula Ln x Ln'x'A y Ti z Ce1-x-x'-y-z O2-.delta. wherein Ln is selected from the group consisting of Sm, Gd and Y; Ln' is selected from the group consisting of La, Pr, Nd, Pm, Eu, Tb, Dy, Ho, Er, Tm, Yb, Lu; A is selected from the group consisting of Mg, Ca, Sr and Ba, 0.05 <= x <= 0.25, 0 <= x' <= 0.25, 0 <= y <= 0.03, 0.001 <= z <= 0.03, 0.05 <= x + x' <= 0.25, 0.001 <= y + z <= 0.03, wherein .delta. is a number which renders the composition of matter charge neutral. The composition can be formed into sintered bodies suitable for use as solid electrolytes in devices including solid-state oxygen generators. Such sintered bodies have greater than 95% theoretical density at temperatures at or below 1600°C, and can be produced by a solid-state method.

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