Nanosized GdCoO 3 cobaltite oxide powder with perovskite structure was successfully synthesized at a relative low calcination temperature using an amorphous heteronuclear complex, GdCo(DTPA)·6H 2O, as a precurs...Nanosized GdCoO 3 cobaltite oxide powder with perovskite structure was successfully synthesized at a relative low calcination temperature using an amorphous heteronuclear complex, GdCo(DTPA)·6H 2O, as a precursor. Differential thermal analysis (DTA) and thermogravimetric analysis (TGA) indicated that the precursor completely decomposed into cobaltite oxide above 400℃. X-ray photoelection spectroscopy (XPS) revealed that the decomposed species was composed of GdCoO 3 cobaltite oxide after the precursor was calcined at 500℃ for 2h. X-ray diffraction (XRD) demonstrated that nanosized GdCoO 3 crystalline powder with perovskite structure was formed after the calcination temperature was increased to 650℃. The GdCoO 3 grain size increased linearly from 20nm to 50nm when the calcination temperature was increased from 500℃ to 800℃, and the grain size increased from 10nm to 30nm when the precursor was calcined at 500℃ for 1 to 8h.展开更多
基金the Initiating Fund for the ReturnedPersonnel from the Ministry of EducationChina
文摘Nanosized GdCoO 3 cobaltite oxide powder with perovskite structure was successfully synthesized at a relative low calcination temperature using an amorphous heteronuclear complex, GdCo(DTPA)·6H 2O, as a precursor. Differential thermal analysis (DTA) and thermogravimetric analysis (TGA) indicated that the precursor completely decomposed into cobaltite oxide above 400℃. X-ray photoelection spectroscopy (XPS) revealed that the decomposed species was composed of GdCoO 3 cobaltite oxide after the precursor was calcined at 500℃ for 2h. X-ray diffraction (XRD) demonstrated that nanosized GdCoO 3 crystalline powder with perovskite structure was formed after the calcination temperature was increased to 650℃. The GdCoO 3 grain size increased linearly from 20nm to 50nm when the calcination temperature was increased from 500℃ to 800℃, and the grain size increased from 10nm to 30nm when the precursor was calcined at 500℃ for 1 to 8h.
