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 American Ceramic Society,
Journal Year:
2024,
Volume and Issue:
107(7), P. 4766 - 4776
Published: Feb. 22, 2024
Abstract
To
develop
multi‐mode
fluorescence
thermometer
with
high
performance,
Lu
2
WO
6
:Er
3+
,Yb
materials
were
successfully
designed
and
prepared.
Under
980
nm
excitation,
the
material
can
achieve
accurate
temperature
measurement
under
three
models.
The
above
models
are
based
on
different
parameters,
including
two
FIR
(fluorescence
intensity
ratio)
derived
from
thermally
coupled
energy
levels
(TCELs)
(
H
11/2
/
4
S
3/2
)
non‐thermally
(NTCELs)
F
9/2
),
as
well
lifetime
(FL)
monitoring
of
level
transition
to
ground
state.
In
mode
TCELs,
maximum
relative
sensitivity
R‐max
minimum
resolution
1.261
%K
–1
0.237
K,
respectively.
repeatability
five‐cycle
measurements
is
98.5%.
value
FL
reach
0.862
0.201
−1
,
obtained
outcomes
suggest
that
might
be
considered
promising
candidates
for
three‐mode
thermometry.
Journal of Materials Chemistry C,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
A
new
type
of
niobate
perovskite
structure
Sr
4
GaNbO
8
:Mn
4+
has
been
prepared
by
us,
which
is
different
from
previous
compounds
and
excellent
relative
absolute
sensitivities
as
well
good
repeatability.
Advanced Optical Materials,
Journal Year:
2024,
Volume and Issue:
12(34)
Published: Aug. 9, 2024
Abstract
Phosphors
with
multifunctional
applications
have
attracted
extensive
research,
especially
in
thermometer
and
anti‐counterfeiting
fields.
Herein,
a
series
of
Pr
3+
‐doped
YNbO
4
(YNO)
phosphors
adjustable
photoluminescence
red
persistent
luminescence
(PersL)
performances
are
developed.
YNO
host
exhibits
the
blue
self‐activated
luminescence,
different
emission
peaks
possess
various
thermal
stability
properties
due
to
quenching
channel
generated
by
intervalence
charge
transfer
state
between
Nb
5+
ions.
Two
kinds
fluorescence
intensity
ratio
models
high
absolute
relative
sensitivities
realized
measure
temperature
under
dual‐wavelength
excitation.
Moreover,
YNO:Pr
PersL
duration
about
120
s
upon
ceasing
UV
excitation
light
source.
The
fabricated
‐polydimethylsiloxane
films
display
patterns
passage
time
after
turning
off
light,
which
can
cleverly
achieve
dynamic
conversion.
These
results
demonstrate
that
phosphor
has
potential
excited
thermometry
