Boron Nitride

Boron Nitride

Hexagonal Boron Nitride is a heat and chemically resistant compound of Boron and Nitrogen, because of its excellent thermal and chemical stability it is primarily used in high-temperature equipment. It is non-wetting by most molten metals, has chemical inertness, low thermal conductivity/expansion, microwave transparency and easily machined. Boron Nitride has unsurpassed thermal stability and is stable at temperatures up to 1000˚C in air, 1400˚ in vacuum, and 2800˚ C in an inert atmosphere.  Typical Applications include: Furnace fixture supports and component ∙Melting Crucibles for glass and metals ∙Plasma &Welding tip insulators∙High-Temp thermal complete ∙Semi-Conductor wafers ∙Nuclear reactor shield ∙Transistor heat sinks∙Microwave tubes∙Sputtering target∙Pump nozzles

Density, ρ g/cm3 2.28
Hardness Mohs 2
Hardness Knoop (kg/mm2 Knoop (kg/mm2) 25-205
Compressive Strength  MPa @ R.T. 23.5
Fracture Toughness, KIc MPa x m1/2 2.6
Max. Use Temperature (in air) ºC 985
Thermal Shock Resistance  ∆T (ºC)  >1500
Thermal Conductivity  W/m-K @ R.T. 20
Coefficient of Linear Thermal Expansion aluminum-ºC  (~25ºC through ±1000ºC)  1.0-2.0
Dielectric Constant  1 MHz @ R.T. 4.08
Dielectric Strength kV/mm 374