The influence of Na₂O on the fast diffusion layer around diopside crystals
2017
Fan, Wendi | Liu, Bo | Yang, Jian | Zhang, Shengen
The establishment of a fast diffusion layer in glass–ceramics can reduce carbon emissions and manufacturing cost during their preparation. In this study a CaO–MgO–SiO₂ (CMS) glass–ceramic was prepared by forming a fast diffusion layer doped with different Na⁺ contents, taking advantage of differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and energy dispersive spectroscopy line scanning (EDSLS). Upon increasing the Na⁺ content from 0.10 mol to 0.14 mol, the number of crystal particles increased by 350%. The Na⁺ content in the fast diffusion layer around the crystal particles decreased, which ultimately affected the crystal growth. This result may benefit the fast diffusion layer theory on the inhibitory effect of Na during crystal growth.
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