Journal of the Turkish Chemical Society Section A Chemistry,
Journal Year:
2024,
Volume and Issue:
11(3), P. 1111 - 1124
Published: July 12, 2024
In
this
paper,
the
effect
of
boron
doping
on
dielectric
properties
was
investigated
using
BaTa2O6:xSm3+,
yB3+
(x=5
mol%,
y=
0,
5,
15,
30,
50,
70,
100
mol%)
and
BaTa2O6:xDy3+,
(x=10
tungsten
bronze
ceramics
fabricated
by
conventional
solid-state
synthesis.
XRD
(X-ray
diffraction)
results
revealed
a
single
BaTa2O6
phase
with
space
group
P4/mbm
(127)
for
both
series.
Additionally,
in
series,
there
an
increase
crystallite
sizes
cell
parameters
increasing
B3+
concentration.
SEM
(scanning
electron
microscopy)
examinations
indicated
that
promoted
grain
growth
elongation.
impedance
results,
concentration
up
to
mol%
increased
constant.
Moreover,
presence
associated
relaxing
transition
B-site
substitution
RE3+
(RE=Sm,
Dy)
ions
contribution
permittivity,
while
tetragonality
or
c/a
ratio
series
ascribed
ferroelectric
Curie
temperature.
decrease
loss
(tan
δ)
occurred,
which
explained
sintering
temperature
boron,
reducing
mobility
oxygen
vacancies.
Journal of the Turkish Chemical Society Section A Chemistry,
Journal Year:
2024,
Volume and Issue:
11(3), P. 1099 - 1110
Published: July 13, 2024
In
the
study,
structural
and
dielectric
properties
of
Ba2GdMO6
(M=Nb,
Ta)
double
perovskite
ceramics
produced
with
solid-state
method
were
examined
by
co-doping
xEu3+
yB3+
(x=10
mol%,
y=0,
5,
15,
30,
50,
70
100
mol%).
XRD
(X-ray
diffraction)
results
ceramic
samples
exhibited
a
single-phase
structure
cubic
symmetry
Fm-3m
space
group,
while
increasing
B3+
concentration
led
to
an
increase
in
crystallite
sizes
lattice
parameters
up
50
mol%
both
series.
SEM
(scanning
electron
microscopy)
examinations
revealed
presence
boron-supported
grain
growth
agglomeration
grains
series,
also
slight
angularity
occurred
shape
at
high
concentrations.
The
constant
(ε')
series
increased
boron
it
was
approximately
33.5
35.4
20
Hz
for
Ba2Gd1-xNbO6:xEu3+,
Ba2Gd1-xTaO6:xEu3+,
yB3+,
respectively.
decrease
after
may
be
attributed
strain
structure,
as
shown
size.
caused
loss
(tan
δ)
which
suppression
oxygen
vacancies
due
hence
ionic
conductivity
loss.
Journal of the Turkish Chemical Society Section A Chemistry,
Journal Year:
2024,
Volume and Issue:
11(3), P. 1111 - 1124
Published: July 12, 2024
In
this
paper,
the
effect
of
boron
doping
on
dielectric
properties
was
investigated
using
BaTa2O6:xSm3+,
yB3+
(x=5
mol%,
y=
0,
5,
15,
30,
50,
70,
100
mol%)
and
BaTa2O6:xDy3+,
(x=10
tungsten
bronze
ceramics
fabricated
by
conventional
solid-state
synthesis.
XRD
(X-ray
diffraction)
results
revealed
a
single
BaTa2O6
phase
with
space
group
P4/mbm
(127)
for
both
series.
Additionally,
in
series,
there
an
increase
crystallite
sizes
cell
parameters
increasing
B3+
concentration.
SEM
(scanning
electron
microscopy)
examinations
indicated
that
promoted
grain
growth
elongation.
impedance
results,
concentration
up
to
mol%
increased
constant.
Moreover,
presence
associated
relaxing
transition
B-site
substitution
RE3+
(RE=Sm,
Dy)
ions
contribution
permittivity,
while
tetragonality
or
c/a
ratio
series
ascribed
ferroelectric
Curie
temperature.
decrease
loss
(tan
δ)
occurred,
which
explained
sintering
temperature
boron,
reducing
mobility
oxygen
vacancies.
