Article,
Synthesis of Ce0.8Sm0.2O1.9 solid electrolyte by a proteic sol-gel green method
CRYSTAL RESEARCH AND TECHNOLOGY, 51 (6): 400-404 (2016)
DOI: 10.1002/crat.201600052
Abstract
The present study reports the synthesis of Ce0.8Sm0.2O1.9 solid
electrolyte by a novel proteic sol-gel method which uses gelatin as
polymerizing agent. The as-synthesized powder material was calcined at
700 degrees C for 2 h, with X-ray diffraction revealing a single cubic phase with lattice parameter a = 0.5435 nm and theoretical density of
7.144 gcm(-3). The average crystallite size is 12 nm, as determined by
the Scherrer equation. Impedance spectroscopy revealed a larger
resistive contribution of the grain boundaries than that from grain
bulk, which, due to its lower activation energy, tends to dominate the
total conductivity above 650 degrees C. The total conductivity is in
line with literature data for ceramics of the same composition prepared
by various methods, thus confirming the potential of the proteic sol-gel
method as a green, low cost alternative synthetic route to prepare
ceria-based solid electrolytes.
