Boron nitride ceramic is a new type of inorganic non-metal material with a flaky structure, obtained by hot pressing sintering of boron nitride and composite material powders, and it possesses special physical and chemical properties as a hexagonal crystal system. Due to the high-temperature and high-pressure sintering of boron nitride powder, its appearance is white, commonly known as "white graphite". Boron nitride can maintain its structural integrity and mechanical properties under extreme high-temperature conditions. Boron nitride can resist oxidation up to 900°C in the air, and its sintering temperature can reach 2000°C under vacuum conditions.It can be used as crucibles, boats, and liquid metal transportation pipes for melting and evaporating metals, rocket nozzles, and bases for high-power devices. It is widely used in electronic packaging and thermal management materials, such as thermal interface materials, insulating ceramics, and high-frequency electronic components.