The Effect of Zirconium Oxide on Properties and Crystallization of Soda-Lime Silicate Glass

Abstract:

In this study, the properties and crystallization of re-melted soda-lime silicate glass cullet added with Al₂O₃, CaCO₃ and ZrO₂ were investigated in order to study the potential usage as a parent glass for glass-ceramics. Al₂O₃, CaCO₃ and ZrO₂ were added into the 71SiO₂-10Na₂O-6K₂O-5CaO-4MgO-2SrO-ZrO₂-Al₂O₃ glass cullet to increase the crystallization of the glass. The glass batches (%wt) of (65-x) Cullet:13Al₂O₃:22CaCO₃:xZrO₂ (x = 0, 1, 2, 4, 6 and 8) were melted at 1500°C for 3 hours. The crystallization was investigated by Differential Scanning Colorimetry technique (DSC) and it was found that the glasses with 6 and 8 %wt of ZrO₂ crystallized rapidly. It means that ZrO₂ acted as the nucleating agent in this glass system. The major crystallines determined by X-ray diffraction technique (XRD) were silica (SiO₂), wollastonite (CaSiO₃) potassium silicate (K₆Si₃O₉) and zirconium oxide (ZrO₂). The thermal expansion of glasses determined by dilatometric method indicated the characteristic of glass-ceramics and the effect of ZrO₂ on the thermal properties of glass. In conclusion, modifying the composition of soda-lime silicate cullet with Al₂O₃ CaCO₃ and ZrO₂ had potential to produce glass-ceramics.

• Periodical: Key Engineering Materials (Volume 751)
• Pages: 374-378
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.751.374
• Online since: August 2017
• Authors: Ekarat Meechoowas*, Surisa Suriyoporn, Usanee Pantulap, Kanit Tapasa
• Keywords: Crystallization, Cullet, Glass-Ceramics, Modified Composition

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