Compositions capable of operating under high oxygen partial...

Details Compositions capable of operating under high oxygen partial... Compositions capable of operating under high oxygen partial...

C - Chemistry, Metallurgy

01

F

C01F 17/00 (2006.01) B01D 53/22 (2006.01) B01D 71/02 (2006.01) C01B 13/02 (2006.01) C01G 51/00 (2006.01) C04B 35/01 (2006.01)

Patent

CA 2171667

The present invention presents a new class of multicomponent metallic oxides which are particularly surted toward use in fabricating component used in sotid-state oxygen separation devices. The compositions of the present invention are represented by the formula LnxA'x'CoyFey'Cuy''3-z wherein Ln is an element selected from the f block lanthanides as represented by the IUPAC periodic table of the elements, A' is selected from strontium or calcium, x>0, y>0, y'>0, x + x'= 1, y + y' + y''=1, 0<y''0.4 and z is a number which renders the composition of matter charge neutral. These compositions provide a favorable balance of oxygen permeance, resistance of degradation when employed in such devices under high oxygen partial pressures and possess coefficients of thermal expansion which are compatible with other materials used to fabricate such devices.

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