INFLUENCE OF F- ON THE SYNTHESIS OF BaCeO3-BASED PROTON CONDUCTORS

Reference	Presenter	Authors (Institution)	Abstract
06-216	Haruan Barreto Braga Capela Do Nascimento	Nascimento, H.B.(Universidade Federal de São Carlos); Kiminami, R.H.(Universidade Federal de São Carlos); Godinho, M.J.(Universidade Federal de São Carlos);	Barium cerate is a candidate material for use in solid-oxide fuel cells (SOFC) and other solid-state ionic devices, due to its high proton conductivity in reduced-temperature operating conditions. The present study investigates the crystal structure, surface and grain morphologies, particle size and distribution as-synthesized nanoparticles of barium cerate with and without the F- as partial replacement of the O2-. Crystalline barium cerate was successfully synthesized in nanoparticle form using a relatively low-temperature polymeric precursor’s method. X-ray diffraction was carried out to understand the formation of various phases at different stages of processing. The evolution of the morphology and both the size and the shape of nanoparticles, were studied by SEM and high-resolution transmission electron microscopy after different heat-treatment temperatures. The results indicate that BaCeO3 with F- as partial replacement of the O2- were obtained successfully, the synthesis method favored the formation of the phase at 900 °C/2h and that the substitution effect with F- was observed in reducing the mean particle size.
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