Thermal behaviour of zircon/zirconia-added chemically durable borosilicate porous glass

M. Hasanuzzaman, M. Sajjia, A. Rafferty, A.G. Olabi

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9 Citations (Scopus)


Macroporous alkali resistant glass has been developed by making additions of zirconia (ZrO2) and zircon (ZrSiO4) to the sodium borosilicate glass system SiO2–B2O3–Na2O. The glass was made using a traditional high temperature fusion process. Differential thermal analysis (DTA) was carried out to identify the glass transition temperature (Tg) and crystallisation temperature (Tx). Based on these findings, controlled heat-treatments were implemented to separate the glass into two-phases; a silica-rich phase, and an alkali-rich borate phase. X-ray diffraction (XRD) was used to identify any crystal phases present in the as-quenched and heat-treated glasses. Fourier transform infrared (FTIR) spectroscopy also proved effective in investigating phase separation and crystallisation behaviour. After leaching, a silica-rich skeleton with an interconnected pore structure and a uniform pore distribution was observed. Pore characterisation was carried out using mercury porosimetry. The size and shape of the pores largely depended on the heat-treatment temperature and time. ZrO2/ZrSiO4 additions increased the alkali resistance of the porous glass 3–4 times.
Original languageEnglish
Pages (from-to)81-88
Number of pages8
JournalThermochimica Acta
Publication statusPublished - 10 Mar 2013
Externally publishedYes



  • Porous glasses
  • Borosilicate glass
  • Phase separation
  • Glass transition
  • Alkali resistance

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