Abstract
Samarium-doped ceria powders for solid electrolyte ceramics were synthesized by a microwave-induced heating combustion process. Cerium nitrate and samarium nitrate were used as the starting materials and various organic compounds, such as citric acid, alanine and glycine as the fuels. The decomposition of gels was investigated by simultaneous thermogravimetry analysis (TGA) and differential thermal analysis (DTA) experiments. The produced ashes and calcined powders were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and surface area measurements. The effects of fuel type on the crystallite size of Ce 1− x Sm x O 2− x/2 powders were studied. The change of the crystal structure with the content of the doped Sm and the fuel was also investigated. The lattice parameter increased almost linearly with the Sm doping level at x≤0.5.
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