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Technical Ceramics

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Hot Pressed Hexagonal Boron Nitride Ceramic Ring

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 - 2,000 degree C
  • Thermal Conductivity :

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

    35 KV/mm
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Product Detail

▼ Material Introduction

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 2,000°C. UNIPRETEC provides various hot pressed boron nitride ceramic parts.


▼ Features

  Good Electrical Insulator
  Easy Machinability
  Good Chemical Inertness
  Good Thermal Conductivity
  High Working Temperature
  Non-wetted by Molten Metal
  Excellent Thermal Shock Resistance
  Outstanding Lubricating Properties   


▼ Boron Nitride Material Applications




● For Hall Effect Thruster
● For Horizontal Continuous Casting
● For Solar and Photovoltaic Industry






● As Melting Crucibles and Liners
● for High Temp. Vacuum Furnaces
● For Metal Powder Gas Atomising


▼ Material Date Sheet

Hexagonal Boron Nitride Properties

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