Processing and Application of Ceramics,
Год журнала:
2024,
Номер
18(4), С. 357 - 365
Опубликована: Янв. 1, 2024
In
this
research,
(1-x)(Ba0.9Sr0.1)TiO3-xBi(Mg2/3Nb1/3)O3
(BST-BMN,
where
x
=
0,
0.06,
0.08,
0.12
and
0.20)
powders
were
synthesized
via
a
solid-state
reaction
method.
The
corresponding
lead-free
ceramics
obtained
at
the
optimal
sintering
temperature.
For
?
material
formed
dense,
homogeneous
pseudocubic
perovskite
structures.
increase
of
BMN
content
induces
strong
relaxor
behaviours
with
diffuse
phase
transition
characteristics,
enhancing
temperature
stability
dielectric
properties.
Consequently,
exhibited
narrow
polarization-electric
field
(P-E)
loops
superior
energy
storage
capabilities.
composition
0.88BST-0.12BMN
was
found
to
be
optimal,
attributed
improvement
in
breakdown
strength,
yielding
recoverable
density
2.504
J/cm3
an
efficiency
90.2%under
electric
strength
250
kV/cm.
Furthermore,
ceramic
retains
consistent
across
temperatures
ranging
from
20
120?C
frequencies
1
100Hz,
underscoring
its
potential
for
application
high-power
pulsed
capacitors.
Journal of the American Ceramic Society,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 1, 2024
Abstract
The
burgeoning
requirement
for
compact
electronic
devices
has
intensified
research
into
lead‐free
dielectric
ceramics
that
offer
superior
recoverable
energy
storage
density
and
efficiency
at
low
electric
fields.
In
this
study,
we
report
the
synthesis
of
Nd
3+
‐doped
(Bi
0.4
K
0.2
Na
Sr
)TiO
3
perovskite
via
solid‐state
reaction
technique.
synthesized
adopted
a
tetragonal
crystal
structure.
As
concentration
ions
increased,
both
maximum
constant
(
ε
m
)
its
corresponding
temperature
T
decrease.
incorporation
perturbed
long‐range
ferroelectric
order,
leading
to
diminished
polarization
P
remanent
r
).
achieved
optimal
properties
with
12
mol%
doping,
showcasing
significant
1.50
J/cm
field
140
kV/cm,
along
an
exceptional
94.6%.
This
not
only
highlights
promising
candidate
materials
in
applications
but
also
introduces
innovative
approach
enhance
performance.
Journal of the American Ceramic Society,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 10, 2024
Abstract
High‐entropy
perovskite
ceramics
have
garnered
widespread
attention
in
the
energy
storage
field
due
to
their
diversified
composition
and
superior
performance.
However,
preparation
of
high‐performance
high‐entropy
ceramic
materials
still
faces
many
challenges
complex
structure.
This
work
systematically
studies
effects
MgO,
SiO
2
,
Li
CO
3
MnCO
on
sintering
temperature
performance
(Na
0.2
Bi
Ba
Sr
Ca
)TiO
(NBBSCT)
ceramics.
The
introduction
successfully
reduced
1150°C
achieved
a
high
efficiency
95.5%
with
this
composition.
NBBSCT
0.5
wt%MgO
exhibited
breakdown
300
kV/cm
an
density
3.7
J/cm
.
study
indicates
that
adding
appropriate
aids
can
significantly
improve
behavior
method
provides
new
insights
into
enhancement
