In Fig. 7, the k* and D* are plotted in a double logarithmic diagram
after [60]. According to Fig. 7, the obtained k* and D* data are in the
expected range for ionic conducting materials.
Conductivity studieswere alsomade on samples of the same composition
and density. The electrical properties as a function of frequency
and temperature were determined by electrical impedance spectroscopy.
The complex impedance plotswere analyzed by fittingwith equivalent
circuits to obtain the resistance and capacitance as a function of
temperature. The total conductivitywas calculated fromthe impedance
data and sample geometry. The equivalent circuitwith resistance R and
constant phase element CPE were used to model the impedance spectrum.
Circuit parameters for the equivalent circuits were obtained by
using the least squares fitting routine in Zview (version 3.1c, Scribner
Associates Inc. USA). Conductivity data (total) obtained for the same
composition is given in Fig. 8.
We can observe from the graph that aluminium- and magnesiumdoped
samples have better conductivity than the undoped counterpart.
As mentioned earlier, the role of iron on the conduction mechanism is
unclear, but they do have a positive influence on the conductivity. This
behaviour is in agreement with conductivity measurement results,
where it has been found that dopingwith aluminium (and magnesium)
leads to an increased ionic conductivity of the ATLS [36 and references
therein].
In Fig. 7, the k* and D* are plotted in a double logarithmic diagramafter [60]. According to Fig. 7, the obtained k* and D* data are in theexpected range for ionic conducting materials.Conductivity studieswere alsomade on samples of the same compositionand density. The electrical properties as a function of frequencyand temperature were determined by electrical impedance spectroscopy.The complex impedance plotswere analyzed by fittingwith equivalentcircuits to obtain the resistance and capacitance as a function oftemperature. The total conductivitywas calculated fromthe impedancedata and sample geometry. The equivalent circuitwith resistance R andconstant phase element CPE were used to model the impedance spectrum.Circuit parameters for the equivalent circuits were obtained byusing the least squares fitting routine in Zview (version 3.1c, ScribnerAssociates Inc. USA). Conductivity data (total) obtained for the samecomposition is given in Fig. 8.We can observe from the graph that aluminium- and magnesiumdopedsamples have better conductivity than the undoped counterpart.As mentioned earlier, the role of iron on the conduction mechanism isunclear, but they do have a positive influence on the conductivity. Thisbehaviour is in agreement with conductivity measurement results,where it has been found that dopingwith aluminium (and magnesium)leads to an increased ionic conductivity of the ATLS [36 and referencestherein].
การแปล กรุณารอสักครู่..