Boron Nitride New High Temperature Reactor for Boron Nitride
Boron nitride – or white graphite as it is also called – is a material only inferior in terms of hardness to diamonds. It is, nevertheless, more tolerant to heat and suffers only little hardness losses even at temperatures around 1000 °C.
Since it is not found in nature, the global demand for boron nitride has to be synthetically produced. Since the production of white graphite - mostly used as a grinding material - is an elaborate process, much design work was put into production processes. AVA now presents a vertical reactor, specially designed for the boron nitride production. The vessel holds a gross volume of 1000 litres and works at temperatures up to 700 °C, AVA states. Company officials say that this temperature can be reached and held only with special steels, ceramic heating elements and very special insulation. A Mitrava helix is used to moove the product inside the reactor along the heated vessel wall, where it flows down in the centre along the shaft, first as a powder, then as a molten mass and finally as the solid end product.