Induction-coupled plasma synthesis of boron nitride nanotubes
First Claim
Patent Images
1. A process for synthesizing boron nitride nanotubes (BNNTs), the process comprising:
- a. introducing a feed consisting of gas including nitrogen and a boron-containing feedstock into a chamber;
b. heating the nitrogen gas and boron-containing feedstock with an induction-coupled plasma to form heated reactants;
c. triggering formation of BNNTs downstream of the induction-coupled plasma; and
d. collecting the BNNTs.
1 Assignment
0 Petitions
Accused Products
Abstract
Described herein are processes and apparatus for the large-scale synthesis of boron nitride nanotubes (BNNTs) by induction-coupled plasma (ICP). A boron-containing feedstock may be heated by ICP in the presence of nitrogen gas at an elevated pressure, to form vaporized boron. The vaporized boron may be cooled to form boron droplets, such as nanodroplets. Cooling may take place using a condenser, for example. BNNTs may then form downstream and can be harvested.
-
Citations
20 Claims
-
1. A process for synthesizing boron nitride nanotubes (BNNTs), the process comprising:
-
a. introducing a feed consisting of gas including nitrogen and a boron-containing feedstock into a chamber; b. heating the nitrogen gas and boron-containing feedstock with an induction-coupled plasma to form heated reactants; c. triggering formation of BNNTs downstream of the induction-coupled plasma; and d. collecting the BNNTs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. A process for synthesizing boron nitride nanotubes (BNNTs), the process comprising:
-
a. continuously introducing reactants consisting of nitrogen and a boron-containing feedstock into a chamber to form a reactant feed; b. passing the reactant feed through an induction-coupled plasma to heat the reactant feed at least the vaporization temperature of the boron-containing feedstock to form a heated reactant feed; c. triggering formation of BNNTs from the heated reactant;
feed downstream of the induction-coupled plasma; andd. collecting the BNNTs. - View Dependent Claims (17, 18, 19, 20)
-
Specification