Propellants Explosives Pyrotechnics,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 28, 2024
ABSTRACT
A
short
review
about
ferrocene‐based
burning
rate
catalysts
(FBRC)
for
solid
composite
propellants
is
presented.
Historically,
transition
metal
oxides
(TMO)
have
been
utilized
as
(BRC)
since
the
start
of
rocket
propellant
development.
However,
these
compounds
a
marked
tendency
to
migrate
through
grain
and
crystallize
at
boundary
surfaces.
Consequently,
FBRC
emerged
an
alternative
TMO.
After
reviewing
recent
advances
in
field,
we
suggest
that
continued
use
Catocene
[2,2′‐bis(ethylferrocenyl)propane]
Butacene
liquid
BRC
choice
based
on
trade‐off
between
high
rates,
limited
migration
from
propellant,
simpler
synthetic
pathways,
lower
costs
production
comparison
with
later
developments
area
FBRC.
Then,
this
work
aims
contribute
state
art
research,
highlighting
importance
Butacene,
most
field
FBRC,
particularly
regarding
their
role
decreasing
decomposition
temperature
ammonium
perchlorate
and/or
increasing
rate.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 10, 2025
Abstract
Achieving
high
energy
release
of
aluminum
(Al)
and
ammonium
perchlorate
(AP)
is
significant
importance
in
the
realm
materials.
In
this
work,
integrated
Al@AP/GO‐CHZ‐M
(M
=
Co
2+
or
Ni
)
composites
are
successfully
synthesized
through
an
design
precise
catalysis
approach.
The
Al@AP/Co
exhibit
fast
decomposition,
with
a
76.6
°C
reduction
decomposition
temperature
66.0%
increase
heat
compared
to
Al+AP
mixture
counterpart.
From
kinetic
perspective,
activation
for
largely
decreased
by
215.5
kJ
mol
−1
(−67.4%)
its
kinetics
shifted
autocatalytic
model.
Transition
metals
GO‐CHZ‐M
facilitate
proton
transfer
during
AP,
significantly
increasing
yield
low‐valence
nitrogen
oxides.
ignition
Al@AP/M
enhanced,
37.2
ms
(−40.2%)
delay
6.6‐fold
radiation
intensity
over
Al+AP.
change
from
deflagration
physical
detonation
further
suggests
release.
Furthermore,
mechanism
on
enhancement
Al@AP
elucidated.
This
approach
holds
broad
application
prospects
fields
solid
propellants,
aluminized
explosives,
micro‐thrusters,
pyrotechnics
systems.
Abstract
The
sluggish
oxygen
diffusion
kinetics
at
the
triple‐phase
boundary
of
air
cathode
significantly
limit
optimal
power
output
Zn‐air
batteries
(ZABs).
Inspired
by
“lotus
effect”,
this
study
developed
a
bifunctional
electrocatalyst,
Co─NCNTs,
featuring
lotus
leaf‐like
structure,
and
constructed
3D
hydrophobic
architecture
to
expand
boundaries.
Consequently,
Co─NCNTs
electrode
(contact
angle
>140°)
demonstrated
enhanced
adsorption
on
surface
compared
hydrophilic
Co─NC
<70°).
assembled
ZABs
incorporating
lotus‐effect‐inspired
bionic
achieved
remarkable
density
341
mW
cm
−2
,
nearly
double
that
Co─NC‐based
battery
(178
),
exhibited
exceptional
cycling
stability,
operating
continuously
for
700
h
current
10
mA
.
This
work
highlights
efficacy
interface
engineering
in
improving
reaction
cathodes
through
design,
offering
promising
strategy
enhancing
oxygen‐involved
energy
storage
systems.
