摘要
在泡生法蓝宝石单晶生长中,固液界面形状对晶体生长质量影响极大。本文针对泡生法蓝宝石晶体生长进行数值模拟,研究了晶体半透明性、放肩角、底部钼屏保温层厚度、加热器侧部和底部功率分配比等对固液界面形状的影响。模拟结果发现:不考虑蓝宝石晶体的半透明性,则固液界面凹向熔体生长,反之则固液界面凸向熔体生长;放肩角增大、底部钼屏保温层增厚,都造成固液界面凸度减小;加热器侧部与底部的功率比增大,则固液界面凸度增大。实际的固液界面形状取决于多种参数的综合作用。
In sapphire single crystal growth by Kyropoulos method, the solid-liquid interface shape has great influence on the quality of crystal. By numerical simulations on the process of Kyropoulos sapphire crystal growth, the influences of crystal translucency, the shoulder angle, the bottom molybdenum screen layer thickness, and the power ratio of side heater to bottom heater on the solid-liquid interface shape are investigated. The simulation results showed that ： without considering the translucency of sapphire crystal, the solid-liquid interface will concave to the melt; conversely, it will convex to the melt. With shoulder angle increasing or bottom molybdenum screen layer thickening, the solid-liquid interface will concave to the melt. With the power ratio of side heater to bottom heater increasing, the solid-liquid interface will convex to the melt. The specific shape of the solid-liquid interface shape depends on the combined effects of the various parameters.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2013年第3期441-445,共5页
Journal of Synthetic Crystals
基金
国家自然科学基金(61176009)
关键词
泡生法
蓝宝石晶体
数值模拟
固液界面
Kyropoulos
sapphire crystal
numerical simulation
solid-liquid interface
