Stable synthesis of few-layered boron nitride nanotubes by anodic arc discharge.

ABSTRACT: Boron nitride nanotubes (BNNTs) were successfully synthesized by a dc arc discharge using a boron-rich anode as synthesis feedstock in a nitrogen gas environment at near atmospheric pressure. The synthesis was achieved independent of the cathode material suggesting that under such conditions the arc operates in so-called anodic mode with the anode material being consumed by evaporation due to the arc heating. To sustain the arc current by thermionic electron emission, the cathode has to be at sufficiently high temperature, which for a typical arc current density of ~100 A/cm², is above the boron melting point (2350 K). With both electrodes made from the same boron-rich alloy, we found that the arc operation unstable due to frequent sticking between two molten electrodes and form

SUBMITTER: Yeh YW 

PROVIDER: S-EPMC5465186 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature