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 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.

BNNT SP10 Form Factors

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

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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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