Boron nitride is a crystal composed of nitrogen atoms and boron atoms. The chemical composition is 43.6% boron and 56.4% nitrogen with four different variants: hexagonal boron nitride (HBN), cubic boron nitride (CBN), rhombohedral boron nitride (RBN) and wurtzite nitrogen Boronide (WBN). Among them, hexagonal boron nitride and cubic boron nitride are more commonly used. https://web.whatsapp.com/send/?phone=8618939001219 read full review »