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Title: Modulating the thermal conductivity in hexagonal boron nitride via controlled boron isotope concentration

Abstract

Hexagonal boron nitride (h-BN) has been predicted to exhibit an in-plane thermal conductivity as high as ~ 550 W m –1 K –1 at room temperature, making it a promising thermal management material. However, current experimental results (220–420 m –1 K –1) have been well below the prediction. Here, we report on the modulation of h-BN thermal conductivity by controlling the B isotope concentration. For monoisotopic 10B h-BN, an in-plane thermal conductivity as high as 585 W m –1 K –1 is measured at room temperature, ~ 80% higher than that of h-BN with a disordered isotope concentration (52%:48% mixture of 10B and 11B). The temperature-dependent thermal conductivities of monoisotopic h-BN agree well with first principles calculations including only intrinsic phonon-phonon scattering. Our results illustrate the potential to achieve high thermal conductivity in h-BN and control its thermal conductivity, opening avenues for the wide application of h-BN as a next-generation thin-film material for thermal management, metamaterials and metadevices.

Authors:
 [1];  [2]; ORCiD logo [3];  [1];  [1]; ORCiD logo [2];  [2];  [1]
  1. Bristol Univ. (United Kingdom)
  2. Kansas State Univ., Manhattan, KS (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1511942
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Communications Physics
Additional Journal Information:
Journal Volume: 2; Journal Issue: 1; Journal ID: ISSN 2399-3650
Publisher:
Springer Nature
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Yuan, Chao, Li, Jiahan, Lindsay, Lucas, Cherns, David, Pomeroy, James W., Liu, Song, Edgar, James H., and Kuball, Martin. Modulating the thermal conductivity in hexagonal boron nitride via controlled boron isotope concentration. United States: N. p., 2019. Web. doi:10.1038/s42005-019-0145-5.
Yuan, Chao, Li, Jiahan, Lindsay, Lucas, Cherns, David, Pomeroy, James W., Liu, Song, Edgar, James H., & Kuball, Martin. Modulating the thermal conductivity in hexagonal boron nitride via controlled boron isotope concentration. United States. doi:10.1038/s42005-019-0145-5.
Yuan, Chao, Li, Jiahan, Lindsay, Lucas, Cherns, David, Pomeroy, James W., Liu, Song, Edgar, James H., and Kuball, Martin. Thu . "Modulating the thermal conductivity in hexagonal boron nitride via controlled boron isotope concentration". United States. doi:10.1038/s42005-019-0145-5. https://www.osti.gov/servlets/purl/1511942.
@article{osti_1511942,
title = {Modulating the thermal conductivity in hexagonal boron nitride via controlled boron isotope concentration},
author = {Yuan, Chao and Li, Jiahan and Lindsay, Lucas and Cherns, David and Pomeroy, James W. and Liu, Song and Edgar, James H. and Kuball, Martin},
abstractNote = {Hexagonal boron nitride (h-BN) has been predicted to exhibit an in-plane thermal conductivity as high as ~ 550 W m–1 K–1 at room temperature, making it a promising thermal management material. However, current experimental results (220–420 m–1 K–1) have been well below the prediction. Here, we report on the modulation of h-BN thermal conductivity by controlling the B isotope concentration. For monoisotopic 10B h-BN, an in-plane thermal conductivity as high as 585 W m–1 K–1 is measured at room temperature, ~ 80% higher than that of h-BN with a disordered isotope concentration (52%:48% mixture of 10B and 11B). The temperature-dependent thermal conductivities of monoisotopic h-BN agree well with first principles calculations including only intrinsic phonon-phonon scattering. Our results illustrate the potential to achieve high thermal conductivity in h-BN and control its thermal conductivity, opening avenues for the wide application of h-BN as a next-generation thin-film material for thermal management, metamaterials and metadevices.},
doi = {10.1038/s42005-019-0145-5},
journal = {Communications Physics},
issn = {2399-3650},
number = 1,
volume = 2,
place = {United States},
year = {2019},
month = {5}
}

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Works referenced in this record:

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