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Boron nitride is a crystal composed of a nitrogen atom and a boron atom. The chemical composition is 43.6% boron and 56.4% nitrogen with four different variants: hexagonal boron nitride (HBN), rhombohedral boron nitride (RBN), cubic boron nitride (CBN) and wurtzite nitrogen Boron (WBN). Cubic Boron Nitride is abbreviated as: CBN or cBN.

At present, the existence of this substance has not been found in nature, and it is a superhard material synthesized by hand. Cubic boron nitride (CBN) is a superhard material that is second only to diamond in hardness. It not only has many excellent properties of diamond, but also has higher thermal stability and chemical inertness to iron group metals and their alloys. As an engineering material, it has been widely used in the processing industry of ferrous metals and their alloy materials. At the same time, it has been applied in a series of high-tech fields with its excellent thermal, electrical, optical and acoustic properties, and has become a promising functional material.

Cubic boron nitride micropowders are used in precision grinding, grinding, polishing and ultra-finishing to achieve high precision machining surfaces. It is suitable for binder, metal, ceramic and other bonding agent systems. It can also be used to produce sintered polycrystalline composite sheets. It can also be used as loose abrasive grains and abrasive pastes.

Black cubic boron nitride CBN has been widely used as superabrasive in the processing of different industries due to its excellent chemical and physical properties, such as high hardness, high thermal stability and chemical inertness, which are second only to diamond. Now it is an indispensable material for the automotive, aerospace, mechatronics, microelectronics and other industries, and it has also received great attention from developed countries.

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