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.
International Journal of Applied Ceramic Technology,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 21, 2025
Abstract
The
5
at.%
Yb:CaF
2
transparent
ceramics
were
fabricated
by
hot
pressing
and
isostatic
(HIP)
using
nano‐powders
synthesized
the
co‐precipitation
method.
Before
pressing,
co‐precipitated
powders
vacuum
calcined
at
different
temperatures.
To
understand
relationship
between
calcination
temperature
resulting
material
properties,
a
series
of
in‐depth
studies
conducted
on
microstructure
optical
properties
ceramics.
Following
HIP
post‐treatment
600°C,
residual
porosity
within
hot‐pressed
was
effectively
eliminated,
leading
to
enhancements
in
quality.
ceramic
samples
pressed
625°C
from
600°C
then
post‐treated
exhibited
highest
in‐line
transmittance
91.0%
1200
nm
as
well
best
laser
performance.
maximum
output
power
1.51
W
slope
efficiency
22.9%
obtained,
surpassing
those
other
via
HP
method
reported
literature.
International Journal of Chemical Reactor Engineering,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 15, 2025
Abstract
The
sodium
magnesium
contains
double
perovskite
structure
compound
i.e.
NaSrBi
1-
x
Eu
WO
6
is
synthesized
by
using
citrate
–
gel
method.
This
prepared
at
different
concentrations
(
=
0.0–0.24)
temperatures
500,
600,
700
°C
for
5
h.
Further,
the
samples
are
characterized
through
tools
like
XRD
(X-ray
diffractro
meter),
UV
Visible
Diffuse
Reflectance
Spectra,
Photo
luminescence
spectra,
FE
SEM
and
CIE
Software
sample
shows
structures
in
various
X-ray
diffractrometer.
Similarly,
lattice
parameters,
peak
positions
explained
all
concentrated
sintered
temperature
However,
which
h
excited
wavelengths
395,
465,
540
nm,
corresponding
emission
intensities
also
recorded.
All
exhibits
towards
high
intensity
peaks
595,
614
nm
their
spectra.
0.12
highest
red
out
of
D
0
-
7
F
1
&
2
major
transitions
formed
spectra
every
sample.
In
same
way
structural
morphology
identified
clearly
SSEM.
color
coordinators
calculated
as
very
close
to
NTSC
phosphor.
Finally,
purity
analyze
quality
light
phosphor
used
W-LEDs
applications.
