Evolution of Cristobalite Clusters on Silica Glass Surfaces in Molten Silicon
Evolution of Cristobalite Clusters on Silica Glass Surfaces in Molten Silicon
复制标题
熔融硅中石英玻璃表面方石英簇的演化
DOI：
10.1149/1.1393333
复制
发表时间：
2000
影响因子：
3.9
通讯作者：
H. Hirashima
中科院分区：
文献类型：
--
作者：
H. Imai;H. Hirashima
研究了石英玻璃与熔融硅界面上的晶体生长，阐明了直拉式坩埚表面环状结构的形成过程。在界面处发现一簇多面方石英横向生长，然后在中心区转变为环状，多面晶体消失。方石英晶团的形成是由于石英玻璃在熔融的硅中的溶解和结晶方石英在成核处的沉积所致。团簇中心区域的晶体重新溶解，形成环状结构。推测方石英团簇的形核位置是由石英玻璃的析晶作用提供的。
Crystal growth at the interface between silica glass and molten silicon was investigated to clarify the formation process of a ring structure at the surface of Czochralski crucibles. A cluster of faceted cristobalite at the interface was found to grow laterally and then transform into a ring with disappearance of the faceted crystals at the central region. The production of the cristobalite cluster is explained by dissolution of silica glass into molten silicon and deposition of crystalline cristobalite at a nucleation site. Redissolution of the crystal at the central area of the cluster resulted in the formation of a ring structure. It is deduced that the nucleation site of cristobalite clusters is provided by the devitrification of silica glass.