Boron Nitride (BN) Ring-Heeger Materials Inc View larger

Boron Nitride (BN) Ring

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Boron Nitride Ring is an advanced synthetic ceramic material and made by hot pressing boron nitride powder at high temperature and pressure. Heeger Materials provides our customers with high-quality Hot Pressed Boron Nitride (H-BN ceramic) at a competitive price. 

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Boron Nitride machinable ceramics are with unique properties – from high heat capacity and outstanding thermal conductivity to easy machinability, lubricity, low dielectric constant, and superior dielectric strength – making boron nitride a truly outstanding material. BN Ring is available from high-temperature-(1900C)-formed 99% pure composite boron nitride materials.

Boron Nitride Ring 

Boron Nitride Ring Parameters




Other components









Flexural Strength



Coefficient of thermal expansion



Thermal conductivity at 20℃



MAX-Temperature of use







RT Resistivity



Boron Nitride Ring Advantages

  • Low wettability to molten metal
  • Relatively high thermal conductivity with low thermal expansion
  • Relatively high thermal shock resistance
  • Extremely high working temperature with proper inert gas protection (>3000C has been recorded)

Boron Nitride Ring Applications

Boron nitride ring has been widely used in the horizontal continuous casting separation ring of molten steel. Boron Nitride(BN), Hexagonal boron nitride (H-BN), and hot-pressed boron nitride are good self-lubricated ceramics that can withstand high temperatures and maintain their lubricating capability in a high vacuum environment.  Hexagonal boron nitride (H-BN) behaves similarly to graphite mechanically but offers excellent electrical resistance.

Boron Nitride ceramics from Heeger Materials can bear high temperatures in a high vacuum environment, plus it has excellent corrosion resistance and electrical resistance. Thus, Boron Nitride ceramic product is an ideal choice in a variety of industries, such as:

  • Linked undergraduate level
  • Lead plate with side sealing plate
  • Amorphous, nanocrystalline with a see-through screen
  • Special metal cathode and draft tube

Hexagonal Boron Nitride Materials Types

  • Pyrolytic boron nitride PBN: 99.99% boron nitride
  • High purity boron nitride HPBN: >98.5% boron nitride + boron oxide
  • Calcium Borate Boron Nitride CABN: >97.5% Boron Nitride + Calcium Borate
  • Aluminum Nitride Boron Nitride ALBN: Boron Nitride + Aluminum Nitride + Boron Aluminum Oxide
  • Zirconia Boron Nitride ZRBN: Boron Nitride + Zirconia + Boron Oxide
  • Zirconium Aluminum Boron Nitride ZABN: Boron Nitride + Zirconia + Aluminum Nitride + Aluminum Boron Oxide
  • Silicon carbide boron nitride SCBN: boron nitride + silicon carbide + boron silicon oxide

Hot Pressed Boron Nitride Ring Materials




Hot pressed at high temperature (1900C).

Excellent corrosion resistance and thermal conductivity. Limited wear resistance

Self-bonded and high purity (>99%)


General-purpose material

Bonded by boric oxide


Calcium borate bonded boron nitride

Enhanced moisture resistance


BN 60%, SiO2 40%


BN 40%, SiO2 60%


BN-45%, Zr2O3 45%

 Boron Nitride Ring Targeted Market

  • High-temperature furnace manufacturing
  • Ceramic manufacturing semiconductor
  • PVD coating
  • Microwave etc.

 Boron Nitride Ring Packing

Boron Nitride (BN) Rings are carefully packaged in cartons boxes with foam protection to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.

Boron Nitride (BN) Ring Packing

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