Raw BNNT Materials

BNNT Materials produces the world's highest quality BNNTs. Our boron nitride nanotubes are now available in multiple as-grown and refined form factors.

BNNT SP10 Product Line

We are now providing our updated BNNT SP10 product. We find SP10 to be preferable to P1-Beta for most applications. BNNTs in SP10 are very similar compared to those in our previous P1-Beta product. However, SP10 has fewer h-BN nanosheets, but slightly more h-BN nanocages than P1-Beta. Elemental boron content of BNNT SP10 is typically 40-50 wt.%, which makes the material grey. The elemental boron in SP10 is easily removed, as in our refined product, SP10-R.  SP10-R-P, a powdered form of SP10-R, is also available. Our BNNT materials are catalyst-free.


Tech Data

h-BN content >99% (refined materials)
Residual Impurities Refined materials contain <1 wt.% elemental boron
Tap Density Low, ~0.25 mg/cm3
Defect density Extremely low (BNNTs flex and recover when bent)
Band gap 5.7 eV (direct measurement by low energy EELS)
Surface area up to 400 m2/g (by multipoint BET)
Network many isolated tubes, bundles up to 5 tubes (by TEM)
Number of walls 1 to 5 walls are typical, 2 or 3 walls are most common (by TEM)
BNNT length up to 200 μm (by SEM), longer suspected

BNNTs vs. CNTs

  Boron nitride nanotubes (BNNT) Carbon nanotubes (CNT)
Electrical Insulating
(~5.7 eV wide-bandgap semiconductor)
Metallic or semiconducting
Optical Strong UV absorbers and transparent in the visible; visible emitters Ultraviolet, visible, and near-infrared absorbers; semiconductors are near-infrared emitters
Radio Frequency transparency Yes (e.g. for 5G or radar) No
Thermal stability Stable to at least 800°C in air Up to 480°C
Thermal neutron capture cross section Boron isotope enrichment dependent (10B ~3825 barns vs. 11B ~0.0055 barns; N = 1.9 barns) C = 0.0035 barn
Bond polarity Polar (B-N) Nonpolar (C-C)
Piezoelectric behavior Yes (0.25 – 0.4 C/m2) Yes
Surface morphology Corrugated Smooth
Color White or translucent Black
Toxicity Very low, possibly no cytotoxicity Yes
Theoretical thermal conductivity
(vs. copper ~400 W/m∙K)
~3,500 W/m∙K (axial)
Mechanical strength
(Young's modulus)
~1.2 TPa
Coefficient of thermal expansion (CTE) -1 x 10-6

Contact Us

BNNT Materials
300 Ed Wright Lane, Suite A
Newport News, VA 23606
United States

PH: +1 (757) 369-1939