Boron Nitride (BN) is a versatile advanced ceramic known for its remarkable combination of high thermal conductivity and electrical insulation. When processed into thin films, BN exhibits excellent thermal stability, oxidation resistance, and dielectric performance, making it an indispensable material for modern electronic and photonic applications.
Material Overview
BN exists primarily in two crystalline forms: hexagonal (h-BN) and cubic (c-BN). The hexagonal phase, often called “white graphene,” has a layered structure similar to graphite, where strong in-plane covalent B–N bonds coexist with weak van der Waals interactions between layers. This configuration yields exceptional thermal conductivity (up to 400–600 W·m−1·K−1) while maintaining excellent electrical insulation (resistivity above 1016 Ω·cm). The cubic phase resembles diamond and offers outstanding hardness and chemical stability. According to Roy et al. (2021), two-dimensional BN films exhibit superior chemical inertness and thermal stability at temperatures above 1000 °C, outperforming many other 2D materials. Recent studies by An et al. (2023) also emphasize that the thermal transport properties of BN nanosheets are highly dependent on thickness, isotopic concentration, and defect density. This tunability enables precise engineering of BN films for diverse high-performance applications.
Applications and Advantages
BN films are increasingly used in microelectronics, photonics, and composite materials. Their high dielectric strength and low dielectric loss make them ideal as insulating layers in semiconductor devices and as heat spreaders in high-power LEDs and integrated circuits. The combination of high thermal conductivity and chemical stability allows BN to serve as a filler in polymer composites for thermal management. Wu et al. (2023) reported that BN nanosheets aligned within polymers significantly improve overall heat dissipation while maintaining electrical insulation, a critical property for encapsulation and flexible electronics. In addition, BN’s transparency to visible and ultraviolet light supports its use in UV detectors and protective coatings for optical components. Advanced BN nanostructures — such as nanotubes, quantum dots, and 3D frameworks — are being explored for next-generation quantum emitters, biomedical coatings, and corrosion-resistant surfaces (Tay et al., 2023).
Goodfellow Availability
Goodfellow supplies high-quality Boron Nitride (BN) films suitable for research and industrial applications requiring superior thermal, dielectric, and chemical performance. Custom thicknesses, purities, and substrate formats are available to meet specialized experimental and engineering requirements.
Explore Boron Nitride BN – Film – Material Information and other advanced materials in Goodfellow’s online catalogue: Goodfellow product finder.
References
- Roy, S., Zhang, X., Puthirath, A. B., Meiyazhagan, A., Bhattacharyya, S., Rahman, M. M., et al. (2021). Structure, properties and applications of two-dimensional hexagonal boron nitride. Advanced Materials, 33(39), 2101589. https://doi.org/10.1002/adma.202101589
- An, L., Yu, Y., Cai, Q., Mateti, S., Li, L. H., & Chen, Y. (2023). Hexagonal boron nitride nanosheets: preparation, heat transport property and application as thermally conductive fillers. Progress in Materials Science, 135, 101154. https://doi.org/10.1016/j.pmatsci.2023.101154
- Wu, W., Zheng, M., Lu, K., Liu, F., Song, Y., Liu, M., & Dang, Z. M. (2023). Thermally conductive composites based on hexagonal boron nitride nanosheets for thermal management: fundamentals to applications. Composites Part A: Applied Science and Manufacturing, 169, 107533. https://doi.org/10.1016/j.compositesa.2023.107533
- Tay, R. Y., Li, H., Lin, J. L., Ng, Z. K., Shivakumar, R., Bolker, A., Shakerzadeh, M., Tsang, S. H., & Teo, E. H. T. (2023). Advanced nano boron nitride architectures: synthesis, properties and emerging applications. Nano Today, 53, 102011. https://doi.org/10.1016/j.nantod.2023.102011