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Al-O-Si Bond Formation in Boehmite-Fumed Silica Mixtures during Mechanochemical Activation

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Interceram - International Ceramic Review

Abstract

Al-O-Si bond formation in boehmite-fumed silica mixtures during mechanochemical activation was investigated by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), magic angle spinning nuclear magnetic resonance (MAS-NMR) and X-ray photoelectron spectroscopy (XPS). The intrinsic structure deformation of the boehmite was examined with XRD. Formation of new Al-O-Si bonds was illustrated by the incorporation of Al3+ in Si-O-Si linkages, the change in the Al coordination number of boehmite, and the appearance of new resonance in the 29Si NMR spectrum of the ground mixture. The presence of Al-O units in silica frameworks was verified by the increase of Al 2p binding energy and the decrease of Si 2p binding energy.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, China

    Liugang Chen, Guotian Ye, Kunpeng Li, Qingfeng Wang & Dayan Xu

  2. Department of Metallurgy and Materials Engineering (MTM), KU Leuven, Leuven, 3001, Belgium

    Liugang Chen & Muxing Guo

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  1. Liugang Chen
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  2. Guotian Ye
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  3. Kunpeng Li
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  4. Qingfeng Wang
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  6. Muxing Guo
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Correspondence to Liugang Chen.

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Chen, L., Ye, G., Li, K. et al. Al-O-Si Bond Formation in Boehmite-Fumed Silica Mixtures during Mechanochemical Activation. Interceram. - Int. Ceram. Rev. 63, 372–375 (2014). https://doi.org/10.1007/BF03401087

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