BNNT - Boron Nitride Nanotube Product Background

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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.

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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.

BNNT SP10 Form Factors

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

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

PH: +1 (757) 369-1939

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