Process for the manufacture of electrodes having perovskite structure for electrochemical high temperature cells

Claim 1

A process for the manufacture of electrode material having a perovskite structure for electrochemical high temperature cells and measuring sondes having oxygen ion-conducting solid electrolytes based on zirconium dioxide or cerium dioxide, comprising an admixture of mixed oxides based on LaMnO 3 or LaNiO 3 or LaCoO 3 , and small amounts of chromium and monovalent or bivalent cations selected from the group of the alkali elements or the alkaline earth elements or of Zn, Cd, Mg, Sn, or Pb, which comprises spraying into a hot reaction zone a solution of metal compounds in a stoichiometric ratio and at a temperature of about 1000° to 1500° K., in the presence of sufficient oxygen for reaction, evaporating the solvent from the non-volatile constituents, whereby during further passage of the constituents through the hot reaction zone, mixed oxides are formed having the desired composition with homogeneous element distribution, particularly chromium distribution, in the atomic range, and separating said oxides from solvent vapors.