Ceramic
dielectric
capacitors
have
gained
significant
attention
due
to
their
ultrahigh
power
density,
current
and
ultrafast
charge-discharge
speed.
However,
potential
applications
been
limited
by
relatively
low
energy
storage
density.
Researchers
employed
various
approaches
enhance
In
this
study,
(1
-
x)(Bi0.5Na0.5)0.7Sr0.3TiO3-xCa(Mg1/3Ta2/3)O3
ceramics
were
prepared
via
a
solid-phase
reaction,
the
effect
of
structure
on
properties
was
investigated.
The
results
indicate
that
introduction
Ca(Mg1/3Ta2/3)O3
significantly
alters
multiscale
structures
(Bi0.5Na0.5)0.7Sr0.3TiO3
ceramic,
including
transformation
from
T-phase
C-phase,
refinement
ceramic
grains,
formation
polar
nanoregions
(PNRs),
accompanied
an
increase
in
bandgap
relaxation
degree.
These
structural
changes
collectively
contributed
improved
overall
modified
ceramics.
Notably,
0.92(Bi0.5Na0.5)0.7Sr0.3TiO3-0.08Ca(Mg1/3Ta2/3)O3
demonstrated
recoverable
density
(Wrec)
8.37
J/cm3
with
efficiency
(η)
87.7%
at
electric
field
530
kV/cm.
It
also
exhibited
good
temperature
stability
(25-120
°C),
frequency
(1-100
Hz),
fatigue
(1-105).
Furthermore,
it
displayed
exceptional
charge
discharge
properties,
(WD),
time
(t0.9),
(CD),
(PD)
attaining
4.06
J/cm3,
35.2
ns,
2143.28
A/cm2,
460.71
MW/cm3,
respectively.
findings
suggest
are
promising
candidates
for
high-power
pulsed
electronic
systems.
Journal of the American Ceramic Society,
Journal Year:
2023,
Volume and Issue:
107(4), P. 2360 - 2370
Published: Nov. 16, 2023
Abstract
Eco‐friendly
ceramic
capacitors
gradually
become
an
important
section
of
pulsed
power
devices.
However,
the
synchronous
realization
ultra‐high
energy
storage
density
(
W
rec
>
6
J/cm
3
)
and
efficiency
η
90%)
is
difficult.
Thus,
a
novel
multiscale
amelioration
strategy
in
Na
0.5
Bi
TiO
‐based
ceramics
proposed
to
achieve
efficiency.
The
for
(Na
0.47
La
0.03
0.94
Ba
0.06
(NBLBT)
focuses
on
grain
size,
bandgap
width,
dielectric
relaxor
behavior,
which
can
be
regulated
by
introducing
Sr(Al
Nb
0.25
Ta
)O
(SANT).
On
one
hand,
refined
size
increased
width
are
conducive
improving
breakdown
strength.
other
optimized
relaxation
behavior
beneficial
suppress
remanent
polarization.
Accordingly,
ultrahigh
=
6.89
90.1%
simultaneously
achieved
0.84NBLBT‐
0.16SANT
ceramic.
In
addition,
sample
synchronously
possesses
excellent
thermal
frequency
stability
(a
variation
within
5%
),
transient
discharge
rate
t
0.9
∼
78.8
ns
high‐power
P
D
114.5
MW/cm
.
This
study
provides
effective
further
develop
Journal of the American Ceramic Society,
Journal Year:
2024,
Volume and Issue:
107(9), P. 6294 - 6306
Published: May 17, 2024
Abstract
The
development
of
ceramics
with
superior
energy
storage
performance
and
transparency
holds
the
potential
to
broaden
their
applications
in
various
fields,
including
optoelectronics,
devices,
transparent
displays.
However,
designing
a
material
that
can
achieve
high
density
under
low
electric
fields
remains
challenge.
In
this
work,
(1−
x
)Bi
0.5
Na
TiO
3
−
BaZr
0.3
Ti
0.7
O
:0.6mol%Er
3+
(abbreviated
as
)BNT−
BZT:0.6%Er
)
ferroelectric
translucent
were
prepared
by
conventional
solid‐state
reaction
method.
properties
are
systematically
investigated
modulating
coupling
between
coexisting
phase
structures
polar
nano
regions.
Especially,
0.9BNT–0.1BZT:0.6%Er
ceramic
exhibits
an
ultra‐high
maximum
polarization
(
P
max
=
66.3
µC/cm
2
),
large
recoverable
W
rec
2.95
J/cm
total
5.75
efficiency
η
51.3%)
190
kV/cm.
sample
also
excellent
thermal
stability
(30‐150°C)
transmittance
(∼28%).
This
work
could
facilitate
advancement
systems
more
efficient
cost‐effective,
provide
opportunities
for
design
manufacture
novel
devices.
Journal of Materiomics,
Journal Year:
2023,
Volume and Issue:
9(6), P. 1015 - 1023
Published: April 14, 2023
Herein,
a
novel
strategy
for
regulating
the
phase
structure
was
used
to
significantly
enhance
recoverable
energy
storage
density
(Wrec)
and
thermal
stability
via
designing
(1-x)[(Bi0.5Na0.5)0.7Sr0.3TiO3]-xBiScO3
((1-x)BNST-xBS)
relaxor
ferroelectric
ceramics.
The
incorporation
of
BS
into
BNST
ceramics
markedly
increases
local
micro-structure
disorder,
causing
high
polarization
inhibiting
hysteresis
0.95BNST-0.05BS
ceramics,
leading
large
Wrec
5.41
J/cm3
with
an
ideal
efficiency
(η)
78.5
%.
Meanwhile,
transmission
electron
microscope
(TEM)
results
further
proved
that
nano-domain
tetragonal
(P4bm)
superlattice
possess
excellent
(20–200
°C).
An
outstanding
value
3.18
×
(1
±
0.03)
η
74.500
0.025
are
achieved
under
temperature
range
from
20
200
°C.
This
work
provides
promising
method
phase-structure
design
can
make
it
possible
apply
temperature-insensitive
ceramic
dielectrics
in
harsh
environments.
