What is hexagonal boron nitride?

Hexagonal Boron Nitride (hBN) --- The crystal structure is similar to graphite, so it is called "white graphite". It is a lubricant with excellent performance, usually a white powder.

Hexagonal boron nitride is a good conductor of heat and an electrical insulator. It has high chemical stability, low friction coefficient and excellent lubricating performance, especially at high temperatures. It still has excellent self-lubricating ability.