Electrodeposition and structural characterization of MCrO3 (M = La, Pr, Nd, Gd, Dy and Y) perovskite oxide coatings on stainless steel substrates

One of the significant challenges of the effective use of functional oxide materials in device applications is to obtain them in the form of thin films or thick coatings. In this work, we show cathodic electrodeposition technique as a cost effective method for fabrication of perovskite chromite coatings. Amorphous precursor hydroxide coatings of M (M = La, Pr, Nd, Gd, Dy, Y) and Cr were co-deposited on stainless steel electrode by cathodic electrodeposition from a nitrate bath. These precursor coatings were further heat treated to obtain MCrO3 perovskite oxide coatings. Heat treatment of La-Cr hydroxide precursor coatings at 600 degrees C and 800 degrees C resulted in coatings of La2CrO6 and LaCrO3 phases respectively. The other M-Cr hydroxides on heating at 800 degrees C for 2 h formed respective single phase MCrO3 perovskite coatings. Interestingly, the SEM images of heat treated perovskite coatings show different morphologies with varying M in MCrO3 (M = La, Pr, Nd, Gd, Dy and Y).

Automated summary

This work demonstrated the cathodic electrodeposition technique as a cost-effective method for fabricating perovskite chromite coatings. The amorphous precursor hydroxide coatings were heat treated to obtain MCrO3 perovskite oxide coatings, showing different morphologies with varying M in MCrO3 (M = La, Pr, Nd, Gd, Dy and Y).