Development History Of Boron Nitride

Boron nitride came out more than 100 years ago. The earliest application was hexagonal boron nitride as a high-temperature lubricant. Not only its structure but also its properties are very similar to graphite, and its own whiteness, so it is commonly called: white graphite.

Boron nitride (BN) ceramics is a compound discovered as early as 1842. A lot of research work has been done on BN materials abroad since the Second World War, and it was not developed until 1955 after the BN hot pressing method was solved. The American Diamond Company and Union Carbon Company were the first to put into production, and in 1960 they had produced more than 10 tons.

In 1957, R·H·Wentrof was the first to successfully trial-produce CBN. In 1969, General Electric Company sold the product as Borazon. In 1973, the United States announced the production of CBN tools. [2]

In 1975, Japan imported technology from the United States and also produced CBN tools.

In 1979, the pulsed plasma technology was successfully used to prepare a collapsed c-BN film at low temperature and low pressure for the first time.

At the end of the 1990s, people have been able to use a variety of physical vapor deposition (PVD) and chemical vapor deposition (CVD) methods to prepare c-BN films.

From the perspective of China, the development is advancing by leaps and bounds. The research on BN powder began in 1963, was successfully developed in 1966, and was put into production in 1967 and used in my country's industry and cutting-edge technology.