1. B-containing nanomaterial synthesis when a combustion wave moves within a packed bed of solid particles.
- Author
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Nersisyan, Hayk, Lee, Tae Hyuk, Yoo, Bung Uk, Kwon, Suk Cheol, Suh, Hoyoung, Kim, Jin-Gyu, and Lee, Jong-Hyeon
- Subjects
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NANOSTRUCTURED materials synthesis , *COMBUSTION , *BORON carbides , *BORON nitride , *PACKED bed reactors , *SELF-propagating high-temperature synthesis - Abstract
This study deals with combustion behavior of B 2 O 3 /Mg/NH 4 Cl/C complex systems for the synthesis of amorphous boron (B), boron carbide (B 4 C), and boron nitride (BN) nanostructures. The raw mixtures used in the experiments were prepared on the base of a B 2 O 3 –Mg precursor mixture, which is sufficiently exothermic to maintain a self-propagating regime of the combustion reaction. Thermodynamic analysis of the combustion temperatures and experimental validation indicate that the 1000–1500 °C temperature range is very effective for synthesizing the nanostructures of B, B 4 C, and BN. It was found that B-containing functional nanostructures are mainly spherical nanoparticles (B) or nanosheets (B 4 C, BN). The phase composition and microstructural characteristics of the final products were evaluated based on the combustion temperature and solid/liquid phase changes. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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