Synthesis and characterization of La0.8Sr0.2Ni(1−x)CrxO3 (x = 0.0, 0.2, 0.4, 0.6, 0.8, 1.0) system by the combustion method
作者： Jairo Alberto Gómez-Cuaspud , Enrique Vera-López
DOI: 10.1016/J.BSECV.2017.05.004
关键词: Microstructure 、 Scanning electron microscope 、 Ceramic 、 Crystallite 、 Materials science 、 Analytical chemistry 、 Perovskite (structure) 、 Oxide 、 Energy-dispersive X-ray spectroscopy 、 Dielectric spectroscopy
摘要: Abstract This research focuses on the synthesis and characterization of six ceramic perovskite oxides based La 0.8 Sr 0.2 Ni (1− x ) Cr O 3 system, with different levels chromium modification ( = 0.0, 0.2, 0.4, 0.6, 1.0), for use as anode material in solid oxide fuel cells (SOFC). The were obtained two reaction stages, starting from corresponding nitrate salts citric acid until formation a metal complex consistent citrate species. organic foams calcined at 1000 °C 120 min under oxygen flow conditions characterized by infrared ultraviolet spectroscopy (FTIR-UV), validating proposed methodology terms purity chemical composition. X-ray diffraction (XRD), scanning electron microscopy (SEM) energy dispersive (EDX) confirms obtention homogeneous structure all analyzed phases. evaluation crystallite size means Debye–Scherrer equation establishes nanometric prevalence around 3.2–4.4 nm along main signals. electrical materials solid-state impedance allowed identifying particular behavior depending microstructure solids potential applications SOFC devices.
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