Comparison of Nanocrystalline LaMO3 (M = Co, Al) Perovskite Oxide Prepared by Co-Precipitation Method

Abstract

Abstract-Nanostructured perovskites with formula LaMO 3 (M = Co, Al) were synthesized by the co-precipitation method and characterized with X-ray Diffraction (XRD), Energy Dispersive X-ray Spectrometry (EDX), X-ray Fluorescence spectrometry (XRF) and Scanning Electron Microscopy (SEM) techniques. The XRD pattern confirmed that all samples are perovskite oxide. Elemental compositions of LaMO 3 were investigated by EDX. The EDX pattern of LaCoO 3 showed the presence of La, Co, and O while La, Al, O and K (as impurity) were detected in LaAlO 3 . SEM micrographs indicated that all perovskite samples were nanosized particles having difference morphologies.

Effect of rGO with BaCuO3 perovskite on the thermal decomposition of AP and NTO

“…For the perovskite sample BaCuO 3 , the crystalline size was found to be in the range of 8–45 nm, as calculated using the Debye–Scherrer method. 23 Here, the BaCuO 3 perovskite oxide was calcined at 700 °C temperature, thus decomposed oxides Ba 2 O 3 , CuO, Ba 2 (CuO 2 ) 3 , and BaO 2 phases were observed in its XRD pattern. The major characteristic diffraction peaks with Miller indices 23 are (103), (110), (210), (211), (105), (015), (114), (200), (020), (222), (320), (321), (123), (206), and (215), found between 2 θ angles of 20 and 60°.…”

“…The SEM images of perovskite BaCuO 3 contained polyhedral grains with small and large particles that facilitated its smoother surface compared to the other samples. 23 …”

“…The XRD crystalline phases of BaCuO 3 and rGO + BaCuO 3 were similar to each other, while the intensity for rGO + BaCuO 3 was observed to be higher, indicating its better crystallinity (Fig.1). For the perovskite sample BaCuO 3 , the crystalline size was found to be in the range of 8-45 nm, as calculated using the Debye-Scherrer method 23. Here, the BaCuO3 perovskite oxide was calcined at 700 C temperature, thus decomposed oxides Ba 2 O 3 , CuO, Ba 2 (CuO 2 ) 3 , and BaO 2 phases were observed in its XRD pattern.…”

“…For the perovskite sample BaCuO 3 , the crystalline size was found to be in the range of 8-45 nm, as calculated using the Debye-Scherrer method. 23 Here, the BaCuO The morphology of synthesized rGO, the perovskite structured BaCuO 3 , and rGO + BaCuO 3 nanomaterials were characterized by eld emission gun (FEG)-SEM analysis. As shown in Fig 1S(a-c), † the BaCuO 3 nanoparticles were uniformly dispersed on the rGO sheets.…”

Effects of Sr and Mn co-doping on microstructural evolution and electrical properties of LaAlO3

“…Calcination in the temperature range of 700-1000°C is sufficient to crystallize the LaAlO 3 perovskite structure in the starting powders, which were obtained by chemical routes, with the crystallite size increasing directly proportional to the calcination temperature [16,17]. However, the solid-state reaction route leads to larger crystallite sizes when compared to chemical synthesis routes [17,18]. In this way, the powders obtained by solid-state reaction after the successive steps of calcination, as described in Section 2, are crystallized in the desired crystal structure of LaAlO 3 , however, the crystallites may present a heterogeneous size distribution.…”