Hexagonal Boron Nitride (hBN) Powder

Hexagonal Boron Nitride is also called ‘White Graphite’ and has a crystal structure similar to Graphite. It is much superior to Graphite and its crystal structure provides good lubricating properties. It is available in powder form in different particle sizes as 70 nm, 150 nm, 0.5 microns, 1.5 microns and 5 microns to 30 microns.

Characteristic of Hexagonal Boron Nitride

  • It has a low coefficient of friction at 0.5 to 0.70 and has excellent lubricating properties.
  • It has good chemical inertness.
  • It acts as an electric insulator.
  • It is a good thermal conductor that leads to better heat dissipation.
  • It shows stability at high temperatures - 1000° C in air, 1400° C in vacuum and 1800° C in inert gas.
  • It has properties like low thermal expansion and low dielectric constant.
  • It has high load-bearing properties.
  • It is non-wetting and provides a strong resistance to chemical attacks. It cannot be wetted by glasses, salts and most metals.
  • It is easily machinable in a hot pressed state and complex shapes can be machined from the hot pressed structure.

Physical properties of Hexagonal Boron Nitride (HBN)

The boron nitride can exist in different forms, depending on the arrangement of the boron and the nitrogen atoms. This gives rise to various bulk properties of boron nitride. The hexagonal form is the most stable and soft among the polymers. Therefore it is used as a lubricant and additive to cosmetic products. 

Uses of Hex Boron Nitride (hBN) powder

  • As hBN powder has a thermal resistance and therefore it is used as an additive for high-temperature lubrication.
  • The hBN powder is used as a lubricant additive and can be dispersed in lubricating oil, grease, water and solvents. When the hexagonal boron nitride powder is mixed with water and binders it can be applied as paint (lubricity coating).
  • The hBN powder can be sprayed or sprinkled on hot surfaces to provide dry lubricity.
  • The hBN has a high electric breakdown strength and resistivity. It is used as an electric insulator in electronics as a substrate for semiconductors, microwave transparent windows, seals, electrodes and as a catalyst in fuel cells and batteries. It can be used as a filler for insulation.
  • It is a good thermal conductor and therefore it is used in different types of heat radiation material.
  • As hBN shows chemical inertness it is used in the manufacture of crucibles, boats, molten metal carriage pipes pumps, thermocouple protection sheaths and lining of reaction vessels.
  • Because of its high lubricity, it is used as a mold release agent for plastic injection and metal injection molds. An hBN coating is used in refractory molds for glass forming and Titanium forming.
  • It is used in the glass manufacturing process due to its non-wetting properties.
  • The powder due to its self-lubricating properties can be mixed with ceramics, alloys, resins, plastics, rubbers and more.
  • As it has high-temperature stability it can be used in many aeronautic and space applications.
  • It is used in the manufacture of paints, cosmetics, dental cement, pencil leads and more.

To buy HBN powder please contact 416 509 4462 or email sales@lowerfriction.com.