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

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

Research output: Contribution to journalArticle

Abstract

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
Volume555
DOIs
Publication statusPublished - 10 Mar 2013
Externally publishedYes

Fingerprint

Zircon
zirconium oxides
Zirconia
Alkalies
Glass
glass
porosity
alkalies
Crystallization
Silicon Dioxide
heat treatment
Heat treatment
Silica
crystallization
silicon dioxide
Borates
Borosilicate glass
borosilicate glass
leaching
Pore structure

Keywords

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

Cite this

Hasanuzzaman, M. ; Sajjia, M. ; Rafferty, A. ; Olabi, A.G. / Thermal behaviour of zircon/zirconia-added chemically durable borosilicate porous glass. In: Thermochimica Acta. 2013 ; Vol. 555. pp. 81-88.
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Thermal behaviour of zircon/zirconia-added chemically durable borosilicate porous glass. / Hasanuzzaman, M.; Sajjia, M.; Rafferty, A.; Olabi, A.G.

In: Thermochimica Acta, Vol. 555, 10.03.2013, p. 81-88.

Research output: Contribution to journalArticle

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AU - Sajjia, M.

AU - Rafferty, A.

AU - Olabi, A.G.

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