Doped Cerium oxide continued to be the candidate electrolyte
material due to its stability and superior ionic conductivity compared to YSZ.
Strontium doped and Magnesium doped Ceria solid solutions, Ce0.99Sr0.01O1.995
and Ce0.99Mg0.01O1.995 were synthesized by cost-effective solid-state reaction
method and were sintered at 1200oC, 1300oC and 1400oC to investigate the effect
of sintering temperature and doping on density, structural and morphological
properties. The bulk densities were measured by the Archimedes method. X-ray
diffraction (XRD) measurements indicate that the synthesized samples were in
single-phase cubic fluorite structure (space group Fm3m). The surface
morphology was determined using scanning electron microscopy (SEM), micrographs
show spherical faceted grains, and the samples were crack-free, dense material
with some pores on the surface which are inconsistent with density results. The
chemical composition was analyzed by the EDS technique. It is observed that the
density increases with increasing sintering temperature and with doping of strontium.
The grain size depends on the sintering temperature and type of doping. The
lattice parameter increases with sintering temperature and substitution of Sr
in ceria. The Grain size of Sr-doped ceria decreases, whereas that of Mg-doped
ceria increases. EDS spectra show that the samples are free of contaminants.
The Ce0.99Sr0.01 O1.995
shows a more open structure than the undoped ceria.
Author(s) Details:
Syed Ismail Ahmad,
General Sciences Department – Physics Division, Ibn Sina National
College for Medical Studies, P.O. Box No. 31096, Jeddah 21418, Saudi Arabia.
Please see the link here:
https://stm.bookpi.org/CPPSR-V9/article/view/14317
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