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 Products

Our Standard Product 10 (SP10) products contain highly-crystalline boron nitride nanotubes which are produced by the catalyst-free high temperature/high pressure (HTP) method, also known as the pressurized vapor/condenser (PVC) method. The raw, as-synthesized products contain ~40 wt.% elemental boron while the refined products (designated by -R) contain <1 wt.% elemental boron. Our BNNT products are available as puffballs, mats, powders, pellets, dispersions, and more which are all customizable to suit your needs. Uniquely, our company’s products in addition to natural boron are also available with isotopes of boron at: 10B (>96%) and 11B (>98%). Contact us with your specific needs.


Tech Data

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