International Journal of Applied Ceramic Technology,
Год журнала:
2024,
Номер
21(5), С. 3554 - 3568
Опубликована: Май 6, 2024
Abstract
Developing
low‐carbon
and
high‐performance
Al
2
O
3
–C
refractories
is
vital
for
extending
the
service
life
of
slide
gate
plate
reducing
carbon
emissions.
In
this
study,
hexagonal
boron
nitride
(h‐BN)
composite
powder
was
prepared
using
magnesiothermic
reduction
combustion
synthesis
route
introduced
into
refractories.
The
phases
composition,
microstructure,
mechanical
properties,
thermal
shock,
slag
corrosion
resistance
were
investigated.
results
show
that
shock
enhanced
by
adding
h‐BN
powder.
Due
to
h‐BN,
consequent
in
situ
formed
spinel
AlN
whiskers,
crack
propagation
deflected,
branched
forming
more
fine
cracks,
then
enhanced.
addition
chemical
inertness
decrease
pore
size
plays
an
important
role
enhancing
synthesized
via
study
demonstrated
potential
application
plates
used
continuous
casting
technology.
Journal of Materials Research and Technology,
Год журнала:
2024,
Номер
29, С. 4833 - 4844
Опубликована: Фев. 27, 2024
To
solve
the
problem
of
deterioration
oxidation
resistance
and
thermal
shock
caused
by
low
carbonization
MgO–C
refractories,
nano-laminated
BN
modified
graphite
was
prepared
molten
salt
method
to
reinforce
unfired
refractories.
The
findings
revealed
that
introduction
significantly
improved
mechanical
properties.
Moreover,
index
refractories
with
4
wt%
34%
lower
than
unadded
samples,
residual
strength
after
increased
224%.
Furthermore,
incorporating
facilitated
formation
columnar
Mg2SiO4,
octagonal
MgAl2O4,
MgO–Mg2SiO4–MgAl2O4–Mg3B2O6
dense
layers,
thereby
contribute
overall
performance
improvements.
Journal of the American Ceramic Society,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 13, 2024
Abstract
MgO–C
refractories
are
of
paramount
importance
in
the
converter
side
blowing
system,
requiring
outstanding
oxidation
resistance
under
harsh
conditions
including
high
temperature,
oxygen
atmosphere,
and
high‐speed
airflow.
In
this
study,
MgSiN
2
phase
reconstruction
was
used
to
improve
refractories,
as
well
mechanical
properties
were
evaluated.
The
results
indicated
that
cold
modulus
rupture
sample
with
9
wt%
increased
by
93.3%
compared
without
.
After
tests,
index
rate
constant
(
k
)
reduced
38.9%
35.3%.
Furthermore,
incorporating
facilitated
formation
layered
dense
structures
consisting
plate‐like
Mg‐Sialon
MgO–Mg
SiO
4
–MgAl
O
This
structural
optimization
effectively
inhibited
diffusion
reaction
within
material,
resulting
gradual
potential
mitigation.
