Thermally Conductive and Electrically Insulating PVP/Boron Nitride Composite Films for Heat Spreader
Artikel i vetenskaplig tidskrift, 2019

Thermally conductive materials with electrically insulating properties have been extensively investigated for thermal management of electronic devices. The combined properties of high thermal conductivity, structural stability, corrosion resistance and electric resistivity make hexagonal boron nitride (h-BN) a promising candidate for this purpose. Theoretical studies have revealed that h-BN has a high in-plane thermal conductivity up to 400 - 800 W m−1 K−1 at room temperature. However, it is still a big challenge to achieve high thermally conductive h-BN thick films that are commercially feasible due to its poor mechanical properties. On the other hand, many polymers exhibit advantages for flexibility. Thus, combining the merits of polymer and the high thermal conductivity of h-BN particles is considered as a promising solution for this issue. In this work, orientated PVP/h-BN films were prepared by electrospinning and a subsequent mechanical pressing process. With the optimized h-BN loading, a PVP/h-BN composite film with up to 22 W m-1 K-1 and 0.485 W m-1 K-1 for in-plane and through-plane thermal conductivity can be achieved, respectively. We believe this work can help accelerate the development of h-BN for thermal management applications.

thermal management

electrical resistvity

PVP/BN composite film; orientation

die attach


Ya Liu

Chalmers, Mikroteknologi och nanovetenskap, Elektronikmaterial

Nan Wang

Smart High Technology

L. Ye

Smart High Technology

Abdelhafid Zehri

Chalmers, Mikroteknologi och nanovetenskap, Elektronikmaterial

Andreas Nylander

Chalmers, Mikroteknologi och nanovetenskap, Elektronikmaterial

Amos Nkansah

Smart High Technology

Hongbin Lu

Fudan University

Johan Liu

Chalmers, Mikroteknologi och nanovetenskap, Elektronikmaterial

Shanghai University

Advancing Microelectronics

22228748 (ISSN)

Vol. 2019 NOR 1-5


Textil-, gummi- och polymermaterial


Annan elektroteknik och elektronik



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