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oxidenitride

Oxidenitride refers to a class of materials that contain both oxide (O2−) and nitride (N3−) anions within a single crystal lattice or glass. These mixed-anion compounds, often called oxynitrides, can appear as ceramics, glasses, or thin films. The nitrogen component is typically incorporated by partial substitution for oxygen in an oxide framework, yielding new compositions and properties not found in simple oxides or nitrides alone.

Structural and chemical aspects

In oxidenitrides, the distribution of O and N can be ordered or disordered and may lead to

Synthesis and processing

Oxidenitrides are typically prepared by high-temperature synthesis that introduces nitrogen sources, such as ammonia or nitrogen-containing

Properties and applications

The presence of both O and N can widen or tune band gaps, affect dielectric behavior, and

See also

Oxynitrides, nitrides, oxides, mixed-anion materials.

a
range
of
crystal
structures,
including
perovskite-related,
layered,
and
other
oxide-nitride
frameworks.
Common
formulation
types
include
ABO3−xNx,
ABO2N,
or
related
compositions,
where
a
cation
framework
accommodates
both
anions.
Real-world
examples
include
aluminium
oxynitride
(AlON),
silicon
oxynitride
(SiON),
and
transition-metal
oxynitrides
such
as
tantalum
oxynitride
(TaON)
and
niobium
oxynitride
(NbON).
The
mixed
anion
chemistry
enables
tuning
of
electronic
structure,
optical
properties,
and
chemical
stability.
reagents,
to
oxides.
Methods
include
solid-state
reactions,
ammonolysis,
nitridation,
and
chemical
vapor
deposition
for
films.
Some
oxidenitrides
are
also
produced
via
sol-gel
routes
followed
by
nitridation,
or
through
specialized
ceramic
processing
to
form
dense
ceramics
or
transparent
oxynitride
glasses.
improve
chemical
stability.
Certain
oxidenitrides
exhibit
visible-light
photocatalytic
activity,
making
them
of
interest
for
solar
fuel
generation
and
environmental
remediation.
Other
examples
serve
as
hard,
wear-resistant
coatings
or
transparent
ceramics.
Ongoing
research
seeks
to
optimize
composition,
anion
ordering,
and
processing
to
exploit
mixed-anion
advantages.