Description:
<jats:title>Abstract</jats:title><jats:p>Sintered and polished samples of La<jats:sub>1−<jats:italic>x</jats:italic></jats:sub>Ca<jats:sub><jats:italic>x</jats:italic></jats:sub>CrO<jats:sub>3</jats:sub>(<jats:italic>x</jats:italic> = 0.0, 0.1, 0,3, 0.5) and La<jats:sub>1−<jats:italic>x</jats:italic></jats:sub>Ca<jats:sub><jats:italic>x</jats:italic></jats:sub>Cr<jats:sub>1−<jats:italic>y</jats:italic></jats:sub>Ni<jats:sub><jats:italic>y</jats:italic></jats:sub>O<jats:sub>3</jats:sub>(<jats:italic>x</jats:italic> = 0.3, <jats:italic>y</jats:italic> = 0.05) were annealed and quenched under reducing or oxidizing conditions at 800 °C and analysed with XPS and SEM. After annealing in H<jats:sub>2</jats:sub> + H<jats:sub>2</jats:sub>O the surfaces of the samples with <jats:italic>x</jats:italic> = 0.3 and <jats:italic>x</jats:italic> = 0.5 were enriched in Ca in a 5 nm deep zone. Cr was not enriched and was present in the +3 state. Annealing in O<jats:sub>2</jats:sub> + H<jats:sub>2</jats:sub>O gave Ca enrichment and crystalline outgrowths, increasing with increasing Ca contents. The Cr in the surface was in the +3 and +6 states, and the amount of Cr<jats:sup>6+</jats:sup> increased with increasing Ca contents. These observations are assigned to precipitation of CaCrO<jats:sub>4</jats:sub> and possibly other phases. The Ni‐doped sample exhibited less grain growth during sintering and less surface recrystallization in oxidizing atmospheres than the corresponding sample without Ni.</jats:p>