以有限元分析法对CdZnTe晶体的垂直布里奇曼法生长的组分过冷模拟计算.doc

第 17 卷第 5 期
2011 年 10 月
功能材料与器件学报
JOURNAL OF FUNCTIONAL MATERIALS AND DEVICES
Vol. 17,No. 5
Oct.,2011
文章编号: 1007 - 4252( 2011) 05 - 0513 - 07
以有限元分析法对 CdZnTe 晶体的垂直
布里奇曼法生长的组分过冷模拟计算
王焱1 ,闵嘉华1,2 ,梁小燕1 ,张继军2
( 1. 上海大学材料科学与工程学院,上海市闸北区延长路 149 号 200072)
摘要: 本文采用有限元分析法,SOL,对 Cd0. 9 Zn0. 1 Te( CZT) 晶体垂直布里奇曼生长法
进行模拟计算。为了研究固液界面过冷度的影响,通过改进传统的晶体生长模型只考虑热传导和热对流,加上了固液界面前沿过冷度的计算模型,组分过冷临界边界条件约束模型,研究分析了不同温度梯度和生长速率生长 CZT 晶体的曲率过冷度,组分过冷度,固液界面前沿的过冷度和热应力值。
关键词: 材料科学基础学科; 数值模拟; 组分过冷度; 曲率过冷度; 热应力;
中图分类号:
文献标识码: A
Investigation of Solute Segregation in CZT - LPVB with Finite
Element Analysis Method
WANG Yan1 MIN Jia - hua1,2 ,LIANG Xiao - yan1 ,ZHANG Ji - jun2
( 1. School of Materials Science and Engineering,
Shanghai University,Shanghai 200072,P. R. China; )
Abstract: Abstract The Cd0. 9 Zn0. 1 Te crystal growth ( LPVB - - Low Pressure Vertical Bridgman) was
numerically simulated and analyzed by the simulation software sol Mutiphysics. The traditional
model only considers about heat conduction and convection. To study the effect of undercooling about sol- id - liquid interface,the undercooling model and the constitutional supercooling boundary constraint mod- el have been added. The curvature position undercooling,forefront of solid - liquid in- terface undercooling and thermal stress have been analyzed with different temperature gradient and growth rates.
Key words: Foundationa