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Sintered Mono-Cordierite Mg2Al4−xBxSi5O18 Glass-Ceramic with B/Al Replacement at the Nano- and Micro-Scale

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Abstract

Sintered glass-ceramics based on cordierite modified glass with partial substitution of aluminum by boron [(Mg2Al4−xBxSi5O18 (x = 1 and 3)] were prepared mainly from natural raw materials. Mono-mineralic cordierite was formed at all the sintering temperatures. The results of infrared spectra confirmed the cordierite presence. The microcrystalline structure shows scattered hexagonal cordierite crystals, either at the micro- or nano-scale, in a glassy groundmass. The microanalysis of the hexagonal crystals indicated the incorporation of some elements in the cordierite structure. The density of the sintered samples was 2.0857 and 1.4857 g/cm 3 and the coefficient of thermal expansion, from room temperature up to 500 ∘C, was in the range from 10.46 and 25.60 × 10−7 ∘ C −1. The microhardness value was 5.64 GPa and 5.90 GPa.

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Authors and Affiliations

  1. National Research Centre, Glass Dep., Dokki, Cairo, 12622, Egypt

    Esmat M. A. Hamzawy

  2. KACST, PO Box 6086, Riyadh, 11442, Saudi Arabia

    Omar A. Al-Harbi

Authors
  1. Esmat M. A. Hamzawy
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  2. Omar A. Al-Harbi
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Correspondence to Esmat M. A. Hamzawy.

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Hamzawy, E.M.A., Al-Harbi, O.A. Sintered Mono-Cordierite Mg2Al4−xBxSi5O18 Glass-Ceramic with B/Al Replacement at the Nano- and Micro-Scale. Silicon 10, 439–444 (2018). https://doi.org/10.1007/s12633-016-9471-3

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  • DOI: https://doi.org/10.1007/s12633-016-9471-3

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