Lattice Thermal Conductivity of Boron Nitride Crystals at Temperatures 1.5 to 300 K

Abstract

Lattice Thermal Conductivity of Boron Nitride Crystals at Temperatures 1.5 t o 300 K ANIL KUMAR and D. PAL BY 2) Sichel et al. /1/ have.observed that the heat capacity of boron nitride crystals is proportional t o T whereas the phonon conductivity shows a T2.4 temperature dependence. Not analysing the entire phonon conductivity curve, they have suggested that the T2*4 temperature dependence of the phonon conductivity curve can be explained by considering the presence of dislocations in the crystal lattice which can be accounted for by static dislocation scattering processes /2/ ( -= D o ). ' d d qj 3

On the Limits of Scanning Thermal Microscopy of Ultrathin Films

“…The highly anisotropic thermal conductivity of h-BN is the most important property, as far as this research is concerned. The in-plane thermal conductivity is estimated to be between 100 Wm −1 K −1 and 2000 Wm −1 K −1 , whereas the cross-plane values fall to only a few Wm −1 K −1 [42][43][44]. Boron nitride nanosheet (BNNS), another term for 2D h-BN, is a layered material with a graphite like structure [45].…”

2D-Based Nanofluids: Materials Evaluation and Performance

“…As an insulating material with very high thermal conductivity [241], h-BN surpasses other nanofillers and is an attractive material for high thermal transport and electrically insulating composites [15,133,236,242]. Nevertheless, theoretical studies indicate that high thermal conductivities can only be achieved from the (002) planes (up to hundreds to thousands of W/m K) [50,243]; through a synthesis process of wet exfoliation, h-BN can give maximum exposure to these (002) lattice planes. Meantime, some thermal management systems need electrically conducting fillers for static electric charge dissipation.…”

Two-dimensional materials

“…As an insulating material with very high thermal conductivity [241], h-BN surpasses other nanofillers and is an attractive material for high thermal transport and electrically insulating composites [15,133,236,242]. Nevertheless, theoretical studies indicate that high thermal conductivities can only be achieved from the (002) planes (up to hundreds to thousands of W/m K) [50,243]; through a synthesis process of wet exfoliation, h-BN can give maximum exposure to these (002) lattice planes. Meantime, some thermal management systems need electrically conducting fillers for static electric charge dissipation.…”