The effect of CeO2 on the crystallization of MgO-Al2O3-SiO2-ZrO2 glass
The effect of CeO2 on the crystallization of MgO-Al2O3-SiO2-ZrO2 glass
复制标题
DOI：
10.1016/j.matchemphys.2018.01.016
复制
发表时间：
2018-06
影响因子：
4.6
通讯作者：
Sabrina A. Seidel;C. Patzig;M. Krause;T. Höche;A. Gawronski;Yongfeng Hu;C. Rüssel
中科院分区：
文献类型：
--
作者：
Sabrina A. Seidel;C. Patzig;M. Krause;T. Höche;A. Gawronski;Yongfeng Hu;C. Rüssel
对质量分数为21.2 MgO·21.2 Al2O3·51.9 SiO2·5.7 zro2的玻璃进行了0.5 mol%的ceo2掺杂，并对其进行了一步和两步结晶处理，分析了其晶相和微观结构。x射线衍射研究表明，在不含ceo2的微晶玻璃中存在四方ZrO2、高/低石英固溶体和尖晶石，它们是微晶玻璃具有良好力学性能所必需的。然而，x射线衍射结果表明，随着ceo2的加入，低石英固溶体和尖晶石的晶体相浓度增加。x射线吸收近边光谱和光谱学表明，Ce主要发生在价态+3。只有极少量的Ce4+存在，这可能导致在样品中观察到轻微的黄色或米色。
Glasses with the mol% composition of 21.2 MgO·21.2 Al2O3·51.9 SiO2·5.7 ZrO2were doped with 0.5 mol% CeO2and analysed concerning their crystal phases and microstructure after a one- as well as a two-step crystallization treatment. X-ray diffraction studies indicate the presence of tetragonal ZrO2, a high-/low-quartz solid solution and spinel which were also obtained in the glass-ceramics without CeO2and are essential for the good mechanical properties of the glass-ceramics. However, the X-ray diffraction results show an increase of the concentration of the desired crystal phases low-quartz solid solution and spinel with the addition of CeO2to the glass composition. As shown by X-ray absorption near edge spectroscopy and optical spectroscopy, Ce occurs mainly in the valence state +3. Only a very small concentration of Ce4+exists which probably leads to the slight yellow or beige colour observed in the samples.