Chemical Interaction between Perovskite $La_{0.6}Sr_{0.4}FeO_3$ and Super-Ionic $Zr_{0.84}Y_{0.16}O_x$

Perovskites are materials of very versatile properties. They may be used in various ways and structures. In this work the results of investigation of the $Zr_{0.84}Y_{0.16}O_x$ electrolyte on $La_{0.6}Sr_{0.4}FeO_3$ perovskite support are presented. The perovskite support was fabricated by iso-axially die-pressing of $La_{0.6}Sr_{0.4}FeO_3$ powders and sintering at 1150°C. The $Zr_{0.84}Y_{0.16}O_x$ layer was deposited on $La_{0.6}Sr_{0.4}FeO_3$ by a combination of colloidal suspension and polymer precursor methods. In this way the dense electrolyte layer was prepared at as low temperature as 400°C. This method may be also useful for high-$T_c$ superconductor layers deposition. The chemical interaction between the electrolyte layer and perovskite support was investigated by X-ray diffraction. It was shown that no reaction occurs between cathode and electrolyte until 900°C. Above 1200°C, parameters of the $La_{0.6}Sr_{0.4}FeO_3$ unit cell increase. It suggests that the reaction between $Zr_{0.84}Y_{0.16}O_x$ and $La_{0.6}Sr_{0.4}FeO_3$ is accompanied by substitutional changes in the $La_{0.6}Sr_{0.4}FeO_3$.