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


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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Correspondence to Wei Wang.

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Wang, W., Wang, B., Zhu, H. et al. A facile method to fabricate Al4B2O9 whiskers on porous SiC substrates for gas–solid separation. J Adv Ceram 4, 232–236 (2015).

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  • ceramics
  • sol–gel process
  • microstructure
  • scanning electron microscopy (SEM)