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Boron Nitride

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Thermally conductive lubricating fillers

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Product Overview

Boron Nitride fillers from 3M­™ offer a way of dramatically increasing the thermal conductivity of polymer composites. Finished parts can achieve up to 10 W/mK in-plane and 4 W/mK through-plane. It is a highly electrically insulating and lightweight material, benefiting select applications in electronics and transport. Miniaturization of electronic components and rapid growth in electric battery technologies have been key drivers in the success of this material, although these are just two sectors amongst a diverse range of use cases.

Boron nitride is also widely used in high-temperature lubrication applications, including where incidental food contact is required.

3M™ offers a unique range of platelets, flakes and agglomerates - each suited to a different application. Contact the technical sales team at Lawrence Industries to see how we can help with your thermal conductivity project.

Brochures & Technical Literature

3M™ Boron Nitride Cooling Fillers - Smart Coolness for Excellent Performance

A look at some of the performance benefits that can be attained with the use of boron nitride and an examination of some of the key application areas.

download Download PDF 184 KB

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Product Features
  • A range of particle size distributions and morphologies are available (platelet, flake, agglomerate)
  • Low density of 1.2-1.6 g/cc
  • High electrical resistivity > 1015 Ohm.cm
  • High thermal conductivity of 400 W/mK in-plane
  • Low Mohs Hardness of < 2
Product Benefits
  • Formulate polymers with thermal conductivities suited for high-performance heat dissipation requirements
  • Lightweight nature means a small increase in part density when compared to other inorganic additives
  • Extremely lubricious and soft so low wear on equipment
  • Excellent pourability and low dusting
  • Reductions in cycle times for injection moulding due to rapid cooling
Typical Applications
  • High-capacity batteries
  • Thermal interface materials (TIM) in electronics
  • LED lighting technology - secondary heat sinks and TIM
  • High-temperature lubricants
  • Motors, generators and transformers
Related Technical Articles

Featured grades with technical datasheets

A brief overview of the key grades with their Technical Datasheets (TDS) is given below.

If you are looking for a Safety Datasheet (SDS), Product Safety Information (PSI) or an alternate grade, then please get in touch or request a sample.

Key points at a glance:

  • A range of particle size distributions and morphologies available.
  • Exceptionally high thermal conductivity in-plane. 
  • High level of electrical insulation and lubricity. 
download Boron Nitride Cooling Fillers Technical Datasheet 406 KB

Key points at a glance:

  • d50 of 3 µm
  • Physiologically inert
  • BET 10-15 m2/g
download S3 Technical Datasheet 707 KB
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