Production of Boron Nitride – Boron Nitride Powder
Reaction of Boron Oxide with Ammonia
In this manufacturing process Boric Oxide or Boric Acid are made to react with Ammonia in the presence of a catalyst (most often Tricalcium Orthophosphate):
The material obtained is heat treated at temperatures up to 2,000°C under Nitrogen. This leads to well-formed Boron Nitride platelets with a thickness of 0.1 to 0.5 µm and a maximum diameter of 5 µm.
Reaction of Boric Oxide with organic Nitrogen Compounds
In this process Boric Oxide or Boric Acid are made to react with Nitrogen compounds such as Melamine or Urea:
The process leads to crystal lattices with a less pronounced three dimensional order.