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Technical Ceramics

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High Purity BN Boron Nitride Setter Plate for Sintering Silicon Nitride Substrate

Boron Nitride can be compared to graphite thanks to lubrication capacities, good thermal conduction and easy machinability, although it's white and has good electrical insulation. Plus, it isn't wetted by most molten metals and can therefore be used as a container for most molten metals.
  • 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 - Hot Pressed Hexagonal Boron Nitride has the same type of layer structure as graphite and provides a very good lubrication/mold-release characteristic. Boron Nitride Ceramic is stable up to approximately 2000°C in the inert atmosphere and 900°C in the air. Besides, Boron Nitride is stable against most organic solvents and corrosive chemicals, and unwettable by most molten metals and glasses. Hexagonal Boron Nitride has high electrical insulation and voltage resistance at high temperature and no changes in permittivity and dielectric loss up to high-frequency area. What's more, because of high thermal conductivity and high heat radiation, hot pressed BN can be applied to various heat radiators.


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


With all the properties, boron nitride setter plate/ boron nitride box is a perfect choice for firing/ sintering Silicon Nitride(Si3N4) substrate and Aluminum Nitride(AlN) substrate.


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) 


More Information About Boron Nitride


Hexagonal Boron Nitride (white graphite) is a loose, lubricating, moisture-absorbing white powder with density 2.27/cm3, Mohs hardness 2, and low mechanical strength, but higher than graphite. No obvious melting point, sublimate at 3000℃ in 0.1Mpa nitrogen atmosphere. The operating temperature in nitrogen or argon is 2000°C. And in oxygen atmosphere, stability is poor, operating temperature is below 1000°C.


Hexagonal Boron Nitride has low expansion coefficient and high thermal conductivity, so it has excellent thermal shock resistance, and it will not be damaged even after hundreds of times of cycle use at 1200-20°C. The expansion coefficient of BN is equivalent to that of quartz, but the thermal conductivity is 10 times that of quartz.


Hexagonal Boron Nitride is a good conductor of heat and a typical electrical insulator. The resistivity at room temperature can reach 1016~1018. Even at 1000℃, the resistivity is still 104~106Ω.cm. The dielectric constant of BN is 3~5, the dielectric loss is (2~8) *10-4, and the breakdown strength is twice that of Al2O3, reaching 30~40 Kv/mm. Hexagonal Boron Nitride has good lubricity and resistance oxidation, corrosion resistance, insulation, thermal conductivity and chemical stability. It can be used to make TiB2/BN composite ceramics, it can also be used for advanced refractory materials and super hard materials, break rings for horizontal continuous rolling steel, for high temperature resistant lubricants and high temperature coatings, and it is also the raw material for the synthesis of cubic boron nitride.


Hexagonal Boron Nitride has excellent chemical stability. It has neither wetting nor effect on most metal melts, such as steel, stainless steel, Al, Fe, Ge, Bi, Si, Cu, Sb, Sn, In, Cd, Ni, Zn, etc. Therefore, it can be used as a high-temperature galvanic couple protection cover, melting metal crucibles, utensils, pipes for conveying liquid metal, pump parts, cast steel abrasive tools and high-temperature electrical insulation materials. Using the heat and corrosion resistance of BN, high-temperature components, rocket combustion chamber linings, thermal shielding of spacecraft, and corrosion-resistant parts of magnetic flow generators can be manufactured.

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