Defence Technology,
Год журнала:
2022,
Номер
27, С. 53 - 63
Опубликована: Ноя. 3, 2022
Combined
with
the
oxidizer
anions
and
fuel
cations,
molecular
perovskite
energetic
materials
show
a
good
potential.
In
this
work,
combustion
behavior
mechanism
of
metal
aluminium
(Al)
material
(H2dabco)[NH4(ClO4)3]
(DAP-4)
as
high-energy
oxidant
was
investigated.
The
DAP-4
based
composites
Al
were
designed
fabricated
by
different
mass
ratios.
Results
showed
that
exhibits
oxygen-supplied
capacity
for
enhancing
performance
Al.
maximum
heat
DAP-4/Al-3
at
Al/O
ratio
38:62
is
up
to
10,412
J/g
in
inert
gas,
which
higher
than
those
other
ratios
mixtures
evolution
pressure
output,
pressurization
rate,
flame
temperature
monitored
DAP-4/Al
Composites
DAP-4/Al/F
characterized
burning
rates.
reaction
provided.
ignited
firstly
released
acid
oxidizing
gases,
corroded
Al2O3
shells
on
particle
surfaces
accelerated
release
lot
energy.
This
work
offered
new
idea
have
great
potential
Al-based
solid
rocket
propellants.
Abstract
Metal‐halide
perovskites
have
emerged
as
versatile
materials
for
various
electronic
and
optoelectronic
devices
such
diodes,
solar
cells,
photodetectors,
sensors
due
to
their
interesting
properties
of
high
absorption
coefficient
in
the
visible
regime,
tunable
bandgap,
power
conversion
efficiency.
Recently,
metal‐free
organic
also
a
particular
class
piezoelectric
applications.
This
broadens
chemical
variety
perovskite
structures
with
good
mechanical
adaptability,
light‐weight,
low‐cost
processability.
Despite
these
achievements,
fundamental
understanding
underlying
phenomenon
piezoelectricity
is
still
lacking.
Therefore,
this
perspective
emphasizes
overview
metal‐halide,
perovskites,
recent
progress
which
may
encourage
material
designs
enhance
applicability
towards
practical
Finally,
challenges
outlooks
are
highlighted
future
developments.
Nature Communications,
Год журнала:
2023,
Номер
14(1)
Опубликована: Ноя. 27, 2023
A
primary
explosive
is
an
ideal
chemical
substance
for
performing
ignition
in
military
and
commercial
applications.
For
over
150
years,
nearly
all
of
the
developed
explosives
have
suffered
from
various
issues,
such
as
troublesome
syntheses,
high
toxicity,
poor
stability
or/and
weak
performance.
Now
we
report
interesting
example
a
with
double
perovskite
framework,
{(C6H14N2)2[Na(NH4)(IO4)6]}n
(DPPE-1),
which
was
synthesized
using
simple
green
one-pot
method
aqueous
solution
at
room
temperature.
DPPE-1
free
heavy
metals,
toxic
organic
components,
doesn't
involve
any
precursors.
It
exhibits
good
towards
air,
moisture,
sunlight,
heat
has
acceptable
mechanical
sensitivities.
affords
performance
on
par
most
powerful
reported
to
date.
promises
meet
challenges
existing
current
explosives,
this
work
could
trigger
more
extensive
applications
perovskite.
Energetic Materials Frontiers,
Год журнала:
2020,
Номер
1(3-4), С. 123 - 135
Опубликована: Дек. 1, 2020
Molecular
perovskite
energetic
crystals,
as
an
emerging
family
of
promising
practicable
materials,
have
attracted
increasing
attentions
in
the
past
few
years.
Different
from
mainstream
strategies
focusing
on
intra-molecular
designs
and
modifications
fused-ring
molecules/ions,
molecular
perovskites
rely
self-assembly
diverse
components
into
specified
ternary
crystal
structures,
hence
generally
could
be
prepared
via
easy
scale-up
process
at
a
low
cost.
As
kind
salts,
they
some
unique
advantages
energetic-material
terms
optimizing
oxygen
balance,
pack
efficiency
(and
density),
decreasing
hygroscopicity,
achieve
improved
detonation
performances
meanwhile
overcome
technical
weaknesses
traditional
binary
salts.
In
this
review,
we
summarize
current
findings
understandings
provide
outlook
for
new
opportunities
brought
by
material
towards
advanced
multi-component
crystals.
Materials & Design,
Год журнала:
2020,
Номер
199, С. 109426 - 109426
Опубликована: Дек. 31, 2020
In
this
paper,
we
studied
the
effect
of
M-doped
graphitic
carbon
nitride
(M-g-C3N4,
M
=
Fe,
Nd,
Ce,
Zr,
U)
as
a
catalyst
for
thermal
decomposition
ammonium
perchlorate-based
molecular
perovskite
DAP-4.
DAP-4
was
synthesized
by
assembly
strategy.
G-C3N4
and
M-g-C3N4
composite
samples
were
prepared
pyrolytic
co-sintering
methods.
X-ray
diffraction,
Fourier
transform
infrared
spectroscopy,
scanning
electron
microscopy-energy
dispersion
spectrometry,
photoelectron
spectroscopy
used
to
characterize
morphology,
structure,
element
distribution,
chemical
states
catalysts.
Differential
calorimetry
elevate
catalytic
g-C3N4
on
The
results
showed
that
have
activity
Among
tested
catalysts,
Fe-g-C3N4
had
best
DAP-4,
well
advantages
over
pure
other
Especially,
reduced
peak
temperature
75.3
°C,
increased
heat
release
464
J
g−1,
decreased
activation
energy
55.5
kJ
mol−1.
Moreover,
possible
mechanism
is
proposed.
This
work
may
offer
new
way
promote
application
in
field
solid
rocket
propellants.
