Orientational changes during the surface crystallisation of cordierite from a B2O3/Al2O3/MgO/SiO2 glass
Orientational changes during the surface crystallisation of cordierite from a B2O3/Al2O3/MgO/SiO2 glass
复制标题
DOI：
10.1039/c2ce25293g
复制
发表时间：
2012-07
期刊：
影响因子：
3.1
通讯作者：
W. Wisniewski;C. A. Baptista;C. Rüssel
中科院分区：
文献类型：
--
作者：
W. Wisniewski;C. A. Baptista;C. Rüssel
采用6B2O3·25Al2O3·10MgO·59SiO2质量分数为wt%的玻璃熔炼退火，研究硼对堇青石表面结晶的影响。将样品在1050°C下退火3小时，以使单晶石结晶，并使用XRD， AFM和基于sem的技术，特别是EBSD进行分析。结果表明，在结晶过程中，沿样品直接表面的单晶粒内发生了显著的取向变化，并形成了残余玻璃的扩散层。在冷却过程中，在残余玻璃中发生液/液相分离，硅石石作为额外的结晶相形成。
A glass of the wt% composition 6B2O3·25Al2O3·10MgO·59SiO2 was melted and annealed in order to study the influence of boron on the surface crystallisation of cordierite. The samples were annealed at 1050 °C for up to 3 h in order to crystallise indialite and analysed using XRD, AFM and SEM-based techniques, especially EBSD. The results show significant orientational changes within single grains along the immediate surface of the sample as well as the formation of a diffusion layer of residual glass during crystallisation. During cooling, a liquid/liquid phase separation occurs in this residual glass and silimanite is formed as an additional crystalline phase.