Morphology and Phase Composition of Sol-Gel Derived Aluminum Borate Nanowhiskers

Pat Sooksaen

doi:10.4028/www.scientific.net/KEM.659.121

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 659Morphology and Phase Composition of Sol-Gel...

Morphology and Phase Composition of Sol-Gel Derived Aluminum Borate Nanowhiskers

Abstract:

Aluminium borate nanowhiskers with varying aspect ratio were synthesized via sol–gel synthesis. The morphology of aluminum borate (Al₄B₂O₉ and Al₁₈B₄O₃₃) nanowhiskers could be controlled by varying the aluminum to boron (Al:B) molar ratio in the sol–gel derived precursors. Sintering temperatures (850 and 1100°C) and sintering times (4 and 32 hours) also affected the phase composition and size of the nanowhiskers. Citric acid was also added in the sol–gel derived precursors as a surface stabilizer for obtaining uniform finely dispersed nanostructures. Fine nanowhiskers were obtained by the calcination at 850°C, whereas higher temperature of 1100°C led to thicker and longer nanowhiskers and became rod-like crystals. The morphology and phase composition were investigated by field emission scanning electron microscope and X-ray diffraction. Chemical bond vibrations in the synthesized nanowhiskers were investigated by Fourier-transform infrared spectroscopy.

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Key Engineering Materials (Volume 659)

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121-126

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https://doi.org/10.4028/www.scientific.net/KEM.659.121

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August 2015

Authors:

Pat Sooksaen*

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Aluminum Borate, Morphology, Nanowhiskers, Sol-Gel, Spectroscopy

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