Three-dimensional foam-like hexagonal boron nitride nanomaterials via atmospheric pressure chemical vapor deposition

Hexagonal boron nitride (h-BN) is a high temperature ceramic material with a graphite-like layered atomic arrangement and excellent basal-plane thermal conduction properties. Unlike graphite, however, h-BN is electrically insulating and possesses superior chemical stability, thereby making it attrac...

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Bibliographic Details
Published in:Journal of materials science 2015-09, Vol.50 (18), p.6220-6226
Main Authors: Ashton, Taylor S, Moore, Arden L
Format: Article
Language:English
Subjects:
Allotropy
Atmospheric pressure
Boron nitride
Ceramics
Characterization and Evaluation of Materials
Chemical vapor deposition
Chemistry and Materials Science
Classical Mechanics
Crystallography and Scattering Methods
Electron beams
energy
foams
graphene
Graphite
High temperature
Materials Science
Nanomaterials
Organic chemistry
Original Paper
Polymer Sciences
Raman spectroscopy
Solid Mechanics
Spectrum analysis
temperature
Thermal properties
Thermodynamic properties
vapors
X-ray diffraction
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Summary:Hexagonal boron nitride (h-BN) is a high temperature ceramic material with a graphite-like layered atomic arrangement and excellent basal-plane thermal conduction properties. Unlike graphite, however, h-BN is electrically insulating and possesses superior chemical stability, thereby making it attractive for many applications for which carbon allotropes are not suitable. In this work, freestanding three-dimensional foam-like h-BN nanomaterials tens of millimeters in size are realized by a low-cost atmospheric pressure chemical vapor deposition (APCVD) process. These three-dimensional foams were found to be ultralight with an effective density of 1.7 ± 0.6 mg/cm³. Strut wall thicknesses were observed to be 311 ± 82 nm, significantly thicker than reported in previous works using alternative CVD approaches. The samples were further analyzed using Raman spectroscopy, electron beam energy dispersive spectroscopy, and X-ray diffraction revealing the samples to exhibit characteristics consistent with h-BN. APCVD processes like the one presented here may provide a simple, scalable means of realizing ultralight hierarchical h-BN nanomaterials with tunable mechanical and thermal properties.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-015-9180-0