Oxygen permeability of mixed conducting perovskite lanthanum gallate-based ceramics

Politova ED; Aleksandrovskii VV; Zaitsev SV; Kaleva GM; Mosunov AV; Stefanovich SY; Avetisov AK; Suvorkin SV; Kosarev GV; Sukhareva IP; Sung JS; Choo KY; Kim TH

Materials Science Forum, Vol.514-516, 412-416, 2006

Politova ED, Aleksandrovskii VV, Zaitsev SV, Kaleva GM, Mosunov AV, Stefanovich SY, Avetisov AK, Suvorkin SV, Kosarev GV, Sukhareva IP, Sung JS, Choo KY, Kim TH

The structure, microstructure, electric transport and oxygen permeation properties of (La,Sr)(Ga,Mg,Fe)O3-delta ceramics with perovskite or brownmillerite structures have been studied. Oxygen permeability values of similar to 0.1 cm(3)/cm(2)-min has been revealed at 1000 K for the ceramics studied. The correlation of electroconducting properties of the LaGaO3-based ceramics with perovskite and brownmillerite structures to their oxygen permeability characteristics has been proved.

Keywords:perovskite;mixed ionic-electronic conductivity;oxygen permeability