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Boron Nitride Ceramic Properties

Boron nitride is a white solid ceramic material, with a nickname of "white graphite" because of its similar appearance and structure. Boron nitride ceramic is an excellent material which has low porosity, good thermal conductivity, low dielectric constant and superior dielectric strength. It is easily machined into complex shapes, and then ready for use without additional heat-treating or firing operations.
Boron nitride has a variety of different variants: hexagonal boron nitride (h-BN), rhombohedral boron nitride (r-BN), cubic boron nitride (c-BN) and wurtzite boron nitride (w-BN). The most commonly used in the industry are h-BN and c-BN.

H-BN & C-BN

Hexagonal boron nitride, abbreviated as hBN, is an electron body having a layered structure similar to graphite. It has good lubricity, electrical insulation, thermal conductivity, and chemical resistance, and also has the ability to absorb neutrons. It is made of nitrogen (such as urea, melamine, etc.) and boron (borax, boric acid, etc.) materials at high temperatures. Hexagonal boron nitride products are easy to process and have high moisture resistance.

Cubic boron nitride (CBN) is a synthetic superhard material that is second only to diamond in hardness. As an engineering material, it has been widely used in the processing of ferrous metals and their alloy materials. At the same time, it has been used in a range of high-tech fields due to its excellent thermal, electrical, optical and acoustic properties. Cubic boron nitride powder for precision grinding, grinding, polishing and finishing to achieve high precision machining of surfaces.

Boron Nitride Properties

High thermal conductivity
Low thermal expansion
Good thermal shock resistance
High electrical resistance
Low dielectric constant and loss tangent
Microwave transparency
Non toxic
Easily machined — nonabrasive and lubricious
Chemically inert
Not wet by most molten metals

Boron Nitride Applications

Electronic parts — heat sinks, substrates, coil forms, prototypes
Boron doping wafers in silicon semiconductor processing
Vacuum melting crucibles: See boron nitride crucible
CVD crucibles
Sputtering targets: See boron nitride sputtering target
High precision sealing, brazing, and metallizing fixtures
Microwave tubes: See boron nitride tube
Horizontal caster break rings
Low friction seals
Plasma arc insulators
High temperature furnace fixtures and supports

Fore boron nitride ceramic products, please visit the Advanced Ceramic Materials website: https://www.preciseceramic.com/.


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