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Doping Bismuth Titanate with Sodium results in a
reduction in the electrical conductivity. This is in
apparent contradiction to the established conduction
mechanism by holes. Sodium doping also results in
phase transformation.
High resolution TEM was done to study the structure
of Bismuth Titanate. The mechanism of the
transformation was studied by observing the
transformation front and the crystallographic index
of the transformation front was calculated from the
Moiré fringes that were observed in the high-
resolution TEM image. From this, a mechanism has
been proposed for the phase transformation. A model
has also been developed to relate the phase
fractions with the conductivity of the multi-phase
samples. A model has been developed to explain the
reduction in the conductivity with Sodium doping. It
is also been shown that the interface between the
phases can offer a significantly large resistance
and possibly plays an important role in reducing the
conductivity of the multiphase, Sodium doped Bismuth
Titanate.
reduction in the electrical conductivity. This is in
apparent contradiction to the established conduction
mechanism by holes. Sodium doping also results in
phase transformation.
High resolution TEM was done to study the structure
of Bismuth Titanate. The mechanism of the
transformation was studied by observing the
transformation front and the crystallographic index
of the transformation front was calculated from the
Moiré fringes that were observed in the high-
resolution TEM image. From this, a mechanism has
been proposed for the phase transformation. A model
has also been developed to relate the phase
fractions with the conductivity of the multi-phase
samples. A model has been developed to explain the
reduction in the conductivity with Sodium doping. It
is also been shown that the interface between the
phases can offer a significantly large resistance
and possibly plays an important role in reducing the
conductivity of the multiphase, Sodium doped Bismuth
Titanate.