Bridgman法晶体生长的瞬态数值模拟  

Transient Numerical Simulation of Bridgman Method

作　　者：张海斌[1] 陈文斌[2] 沈定中[1] 任国浩[1] 

机构地区：[1]中国科学院上海硅酸盐研究所,上海200050 [2]复旦大学数学系,上海200443

出　　处：《人工晶体学报》2003年第6期546-549,共4页Journal of Synthetic Crystals

基　　金：国家自然科学基金(No 59732040)

摘　　要：采用变形有限元法对坩埚下降法晶体生长过程进行了瞬态数值模拟。对随下降距离生长位置、生长速度、界面位置处的法线方向温度梯度和凹度的变化进行了分析说明,将生长过程划分为三个阶段。结果表明在整个生长过程中,晶体生长条件一直处于变化之中,因而晶体的质量也在整块晶体中呈现一定的波动性。Transient numerical simulation for Bridgman method was carried out by means of deforming finite element method . The changes of growth position, growth velocity, temperature gradient above the interface and below the interface and concavity with the descending distance or descending time were analyzed; and the growth procedure was divided into three stages. It is indicated that the growth condition changes continually during the whole growth procedure, resulting in the quality variation in a whole crystal.

关 键 词：晶体生长 BRIDGMAN法 瞬态数值模拟 坩埚下降法 变形有限元法 

分 类 号：O782[理学—晶体学]