Three-dimensional foam-like hexagonal boron nitride nanomaterials via atmospheric pressure chemical vapor deposition
| Autor: | Taylor S. Ashton, Arden L. Moore |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Materials science
Mechanical Engineering Energy-dispersive X-ray spectroscopy chemistry.chemical_element Nanotechnology Thermal conduction Nanomaterials symbols.namesake chemistry Mechanics of Materials visual_art visual_art.visual_art_medium symbols General Materials Science Chemical stability Graphite Ceramic Composite material Raman spectroscopy Carbon |
| Zdroj: | Journal of Materials Science. 50:6220-6226 |
| ISSN: | 1573-4803 0022-2461 |
| DOI: | 10.1007/s10853-015-9180-0 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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