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

Hasanuzzaman, Mohammed orcid logoORCID: 0000-0003-1838-0091, Sajjia, Mustafa, Rafferty, Aran and Olabi, Abdul-Ghani orcid logoORCID: 0000-0002-7865-1757 (2013) Thermal behaviour of zircon/zirconia-added chemically durable borosilicate porous glass. Thermochimica Acta, 555 . pp. 81-88. ISSN 0040-6031

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 asquenched 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 heattreatment temperature and time. ZrO2/ZrSiO4 additions increased the alkali resistance of the porous glass 3–4 times.
Item Type:Article (Published)
Refereed:Yes
Uncontrolled Keywords:Porous glasses; Borosilicate glass; Phase separation; Glass transition; Alkali resistance
Subjects:Engineering > Materials
DCU Faculties and Centres:DCU Faculties and Schools > Faculty of Engineering and Computing > School of Mechanical and Manufacturing Engineering
Publisher:Elsevier
Official URL:http://dx.doi.org/10.1016/j.tca.2012.12.018
Copyright Information:© 2013 Elsevier
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
ID Code:18028
Deposited On:18 Apr 2013 10:44 by Abdul Olabi . Last Modified 03 Feb 2021 13:18

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