Boron Nitride PBN BN
About Boron Nitride Ceramic
Boron Nitride is an advanced synthetic ceramic material available in solid and powder form. Its unique properties – from high heat capacity and outstanding thermal conductivity to easy machinability, lubricity, low dielectric constant and superior dielectric strength – make boron nitride a truly outstanding material.
In its solid form, boron nitride is often referred to as “white graphite” because it has a microstructure similar to that of graphite. However, unlike graphite, boron nitride is an excellent electrical insulator that has a higher oxidation temperature. It offers high thermal conductivity and good thermal shock resistance and can be easily machined to close tolerances in virtually any shape. After machining, it is ready for use without additional heat treating or firing operations.
In inert and reducing atmospheres, the AX05 grade of Boron Nitride grades will withstand temperatures over 2,000°C. It is commonly used as an insulator in contact with tungsten and graphite electrodes at those temperatures.
All Boron Nitride grades can be used in oxidizing atmospheres up to 750°C. It is not wet by most molten metals and slags and can be used in contact with most molten metals including aluminum, sodium, lithium, silicon, boron, tin, germanium, and copper.
Boron Nitride is available in a variety of solid grades, differentiated by binder and composite – A, AX05, HP, HPL, M, M26 and ZSBN. Boron nitride ceramic is particularly well suited as a burning bear material due to its high temperature resistance and its thermal cycling resistance. It does not react with many metals, ceramic rare earth, and other materials, and does not pollute the product. It does not crack in the hot and cold and hot environment. It can be used for sintering rare earth, ceramics and melting alloy, and also used in electron beam evaporation coating.
1. Excellent high temperatures resistance
2. Excellent thermal cycling resistance
3. Low thermal expansion
4. Resists wetting by the vast majority of molten metals
BN Composites: BN+AL/Sic/ZrO2/AIN