Hexagonal Boron Nitride
WHAT IS HEXAGONAL BORON NITRIDE?
Hexagonal Boron Nitride, also known as just Boron Nitride or hBN and sometimes called "white graphite," is a chemical compound that is produced from boron compounds in a high temperature reaction. It is one of the most lubricious materials known. With a coefficient of friction as low as 0.15, and being "cleaner" to use than molybdenum disulfide and tungsten disulfide, it is a superb dry lubricant for many applications, particularly bullet and gun barrel coating.