Synthesis, characterization and application of some nanosized mixed metal oxides as high heat resistant pigments: Ca2CuO3, Ca3Co2O6, and NiSb2O6

Abstract

Mixed metal oxides have been widely used for various applications such as pigments in coatings. This work presents synthesis of a group of mixed metal oxides (Ca2CuO3, Ca3Co2O6 and NiSb2O6) by employing two simple synthesis techniques namely; co-precipitation and solid-state calcination method. The prepared pigments were characterized using X-ray diffraction, infra-red spectroscopy, and scanning electron microscopy. The obtained XRD results showed that single phase double oxide compounds were the main components in each case. SEM images showed the formation of either platelet or well defined polyhedron crystal structures based on the type of the double oxide and the preparation method. The physical, mechanical, heat and corrosion resistance of dry paint films were also examined. The obtained results revealed that the prepared calcium based pigments showed excellent heat and corrosion resistance and that with copper oxide is the best in performance among others.