電解析出法によるペロブスカイト型ランタンクロム複合酸化物皮膜の形成

抄録

A method to form LaCrO₃ oxide films on metals was developed. It was found that cathodic polarization of metals in La (III)-Cr (VI) solutions forms La (III)-Cr (VI) oxyhydroxide films on the metals. By controlling solution composition and pH, cathode potential, and electrolysis time, LaOH (CrO₄)xH₂O films were obtained with good reproducibility. The compound was found to decompose to LaCrO₃ at lower temperarures and with shorter pyrolysis times than La (III) and Cr (III) compound precursors. The LaCrO₃ film on stainless steels displayed good oxidation resistance. The LaCrO₃ powder can also be synthesized from La (III)-Cr (VI) systems with lower enegy consumption.