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- W2896069936 abstract "Abstract In the current paper, we proposed a novel, one-step method to simultaneously prepare MgO-Al2O3-SiO2 glass-ceramics and Ni-Fe alloy from laterite ore with the addition of TiO2. The one-step method makes full use of the thermal energy of the molten slag so that the energy consumption for the production of the glass-ceramics is much lower than that in a more conventional method. Moreover, the slag utilization rate can reach 100%. In this method, 0–4 g of TiO2 as a nucleating agent was added into laterite ore to control the phase composition and microstructure of glass-ceramics. The effects of the addition of different amounts of TiO2 on the crystallization behaviour, major crystalline phase, microstructure and various properties of glass-ceramics were investigated by XRD, SEM, EDS and a Vickers hardness tester. The results show that with an increase in the amount of TiO2 added (0–3 g), the μ-cordierite gradually precipitated and became the main crystalline phase of the glass-ceramics. Meanwhile, the crystallinity, grain size and acid/alkali resistance were all enhanced with increased TiO2 addition. The micro-hardness increased from 6.699 GPa to 9.156 GPa. However, as the amount of TiO2 added increased up to 4 g, a large amount of sapphirine ((Mg4Al4)(Al4Si2)O20) precipitated in the glass-ceramics. The major crystalline phase of the glass-ceramics begins to change from μ-cordierite to sapphirine, accompanied by a decrease of its density, acid/alkali resistance and micro-hardness. This study is helpful for extending the one-step method of simultaneously preparing glass-ceramics and metals to other low-grade ores and not just laterite ore." @default.
- W2896069936 created "2018-10-26" @default.
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- W2896069936 date "2019-03-01" @default.
- W2896069936 modified "2023-09-24" @default.
- W2896069936 title "Effect of TiO2 on the crystallization and properties of MgO-Al2O3-SiO2 glass-ceramics prepared by an one-step method from laterite ore" @default.
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- W2896069936 doi "https://doi.org/10.1016/j.ceramint.2018.10.051" @default.
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