Applications of Borazine and Polyborazylene for Boron Nitride Materials
On of the most common non-oxide ceramic materials
that have enjoyed significant
commercial application is boron
nitride. Boron nitride is isoelectronic
with carbon and has several
crystalline modifications like
diamond. Thus, boron nitride
has forms similar to graphite,
cubic diamond and hexagonal
diamond. Commercially, boron
nitride is readily available
as a powder being easily prepared
by the pyrolysis of readily
available inexpensive reagents.
However, the boron nitride powders
lack flexibilty in being readily
converted into ceramic forms
such as fibers, coatings and
foams. Borazine and polyborazylene,
containing a ratio of B:N of
one, are ideally suited to form
high purity boron-nitride materials
which can begin to address the
shortcomings of the BN powder
forms.
Borazine and polyborazylene excellent one source
precursors for BN, having a
B:N ratio of one and of low
toxicity. For BN, a good-quality
film would have attractive properties.
Cubic BN is extremely hard (#2
to diamond). It is transparent
in the visible. Thus applications
for cutting and grinding tool,
protective optical coatings
exist. It has high resistivity
and high thermal conductivity
with applications for high temperature/high
frequency semiconductor devices.
A wide band gap, ~6eV, is useful
for UV photodiode. Likewise,
the advantages of hexagonal
BN films on materials have led
to numerous investigations.
Well ordered films of h-BN can
be deposited on transition metal
surfaces using borazine [A Nagashima
et al, Phys. Rev. B., 51 3918
(1995)]. Recently, using borazine,
a BN nanomesh has been deposited
on Rh(111). The namomesh has
no known analog in carbon allotropes.
[www.sciencemag.org, Science,
Vol 303, (9) p217, 20 04]
Borazine, Polyborazylene and Ammonia-Borane Applications for different Industry
For Aircraft Brakes Industry
For Electronic & Semiconductor Industry
For Nanotechnology
Ammonia-borane technology for Hydrogen Economy
Borazine and Polyborazylene for Ceramic Coating
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