In one embodiment, the method of producing a ceramic assembly includes:
disposing an electrode precursor on an electrolyte precursor having an
electrolyte sintering shrinkage, disposing a stabilizer precursor having
a stabilizer sintering shrinkage on the electrode precursor on a side
opposite the electrolyte precursor to form a precursor assembly, and
sintering the precursor assembly to form the ceramic assembly comprising
a stabilizer layer, electrode, and electrolyte. The difference between
the electrolyte sintering shrinkage and the stabilizer sintering
shrinkage is less than or equal to .+-.1% and a surface of the ceramic
assembly has less than or equal to about 5.0 degrees camber, as measured
from the horizontal plane.