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Al4B2O9 whiskers on the surface of porous SiC substrates were fabricated by chemical reactions between Al(NO3)3 and H3BO3, which is a facile method to prepare cilia-like microstructure for gas–solid separation. Scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared (FTIR) spectroscopy were employed to investigate the structural morphology and phase compositions. Al4B2O9 whiskers with nanometer-sized diameters and micrometer-sized lengths grew on the surface of SiC substrates, and a self-catalytic mechanism was used to explain Al4B2O9 whisker growth.


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A facile method to fabricate Al4B2O9 whiskers on porous SiC substrates for gas–solid separation

Show Author's information Wei WANGa( )Boya WANGaHanghui ZHUaHongwei LIbShunxi DENGa
Department of Chemical Engineering, College of Environment Science and Engineering, Key Laboratory of Subsurface Hydrology and Ecology in Arid Areas, Ministry of Education, Chang'an University, Xi'an 710054, China
College of Materials Science and Engineering, Chang'an University, Xi'an 710061, China

Abstract

Al4B2O9 whiskers on the surface of porous SiC substrates were fabricated by chemical reactions between Al(NO3)3 and H3BO3, which is a facile method to prepare cilia-like microstructure for gas–solid separation. Scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared (FTIR) spectroscopy were employed to investigate the structural morphology and phase compositions. Al4B2O9 whiskers with nanometer-sized diameters and micrometer-sized lengths grew on the surface of SiC substrates, and a self-catalytic mechanism was used to explain Al4B2O9 whisker growth.

Keywords:

ceramics, sol–gel process, microstructure, scanning electron microscopy (SEM)
Received: 14 February 2015 Revised: 23 April 2015 Accepted: 03 May 2015 Published: 07 July 2015 Issue date: September 2015
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Publication history

Received: 14 February 2015
Revised: 23 April 2015
Accepted: 03 May 2015
Published: 07 July 2015
Issue date: September 2015

Copyright

© The author(s) 2015

Acknowledgements

This work was financially supported by the Shaanxi Provincial Science and Technology Co-ordinating Innovation Projects (2012KTZB03-01-04) and the Fundamental Research Funds for the Central Universities (2013G1291068).

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