BNNT, LLC tubes are synthesized using the high temperature/high pressure (HTP) method, also called the pressurized vapor/condenser (PVC) method. This method produces highly flexible, large aspect ratio BNNTs with high crystallinity. Key specifications of our material are summarized in the table below.
|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|
Below are photos of our current puffball, powder, and mat products. (back, left to right) SP10 puffball, SP10-R puffball, SP10-R-P powder, and (front) SP10-R-M mat. The as-grown puffball material has a cotton-like appearance with a very low tap density as shown in the photo below.
Read the full "Boron Nitride Nanotube: Synthesis and Applications" paper.