Mechanochemical synthesis and thermal stability of Ca-doped high-entropy La(Co,Cu,Fe,Mn,Ni)O3-δ perovskites

In this study, the feasibility of preparing novel Ca-doped high entropy La(Co,Cu,Fe,Mn,Ni)O3-delta perovskites by mechanochemical synthesis was explored. It was found that monophasic compounds can be obtained after 150 h of milling, characterized by the nano size of their crystals and a significant concentration of oxygen vacancies, likely due to the incorporation of bivalent cations…