Synthesis of nano-sized amorphous boron powders through active dilution self-propagating high-temperature synthesis method

Journal Article · Sat Jun 01 00:00:00 EDT 2013 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2013.01.053· OSTI ID:22341662

Wang, Jilin ^[1]; Gu, Yunle ^[2]; Li, Zili ^[1]; Wang, Weimin ^[1]; Fu, Zhengyi ^[1]

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1. The State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070 (China)
2. School of Material Science and Engineering, Wuhan Institute of Technology, Wuhan 430073 (China)

Graphical abstract: Nano-sized amorphous boron powders were synthesized by active dilution self-propagating high-temperature synthesis (SHS) method. The effects of endothermic reaction rate, the possible chemical reaction mechanism and active dilution model for synthesis of the product were also discussed. Highlights: ► Nano-sized amorphous boron powders were synthesized by active dilution self-propagating high-temperature synthesis method. ► The morphology, particle size and purity of the samples could be effectively controlled via changing the endothermic rate. ► The diluter KBH{sub 4} played an important role in active dilution synthesis of amorphous nano-sized boron powders. ► The active dilution method could be further popularized and become a common approach to prepare various inorganic materials. - Abstract: Nano-sized amorphous boron powders were synthesized by active dilution self-propagating high-temperature synthesis (SHS) method at temperatures ranging from 700 °C to 850 °C in a SHS furnace using Mg, B{sub 2}O{sub 3} and KBH{sub 4} as raw materials. Samples were characterized by X-ray powder diffraction (XRD), Laser particle size analyzer, Fourier transform infrared spectra (FTIR), X-ray energy dispersive spectroscopy (EDX), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and high-resolution transmission TEM (HRTEM). The boron powders demonstrated an average particle size of 50 nm with a purity of 95.64 wt.%. The diluter KBH{sub 4} played an important role in the active dilution synthesis of amorphous nano-sized boron powders. The effects of endothermic reaction rate, the possible chemical reaction mechanism and active dilution model for synthesis of the product were also discussed.

• OSTI ID: 22341662
• Journal Information: Materials Research Bulletin, Vol. 48, Issue 6; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BORATES
BORON OXIDES
CHEMICAL REACTIONS
DILUTION
ELECTRON DIFFRACTION
FOURIER TRANSFORMATION
IMPURITIES
INFRARED SPECTRA
NANOSTRUCTURES
PARTICLE SIZE
POWDERS
RAW MATERIALS
REACTION KINETICS
SCANNING ELECTRON MICROSCOPY
SPECTROSCOPY
SYNTHESIS
TRANSMISSION
TRANSMISSION ELECTRON MICROSCOPY
X RADIATION
X-RAY DIFFRACTION