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Technical Ceramics

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HBN Hot Pressed Hexagonal Boron Nitride Ceramic Crucible

Parts made of Hexagonal Boron nitride are critical components in applications where excellent thermal shock resistance, high electrical resistivity and chemical and corrosion resistance is required. BN Boron Nitride can be machined into close tolerance and complex parts.
  • Density :

    2.0 - 3.0 g/cm3
  • Max. Service Temp. :

    900 - 2000 degree C
  • Thermal Conductivity :

    30 - 80 W/m.K
  • Dielectric Strength :

    35 KV/mm
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Product Detail


HBN - Hexagonal Boron Nitride exhibits a hexagonal structure and is sometimes known as white graphite, due to its lubricity, anisotropic properties, heat resistance, and high thermal conductivity. This latter property, combined with a low thermal expansion, leads to excellent resistance to thermal shock. All three forms, hot pressed, pyrolytic and hot isostatic pressed, can be used at very high-temperatures. However, in an oxidizing atmosphere the maximum use temperature is 850-900°C. Hot pressed and hot isostatic pressed boron nitride are produced by densification of powder, whereas pyrolitic boron nitride is produced by chemical vapor deposition (CVD), depositing onto graphite at temperatures in excess of 2000°C.


Properties of Hot Pressed Hexagonal Boron Nitride BN:


  Low density   Excellent Machinability
  Good chemical inertness   High electrical resistivity
  High thermal conductivity   High temperature material
  Excellent thermal shock resistance   Excellent lubricating properties
  High dielectric breakdown strength     Non-wetted by molten metal & glass


Applications of Hot Pressed Hexagonal Boron Nitride BN:


  CVD crucibles    Microwave tubes 
  Low friction seals    Sputtering targets 
  Plasma arc insulators    Microcircuit packaging 
  Vacuum melting crucibles    Horizontal continuous casting break rings 
  High temperature furnace fixtures and supports    High precision sealing, brazing, and metallizing fixtures 
  Boron doping wafers in silicon semiconductor processing    Electronic parts(heat sink, substrate, coil form, prototype) 

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