| 垂直布里奇曼法生长CdZnTe晶体的径向溶质偏析之有限元分析法模拟 |
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| 引用本文： | 王焱,闵嘉华,梁小燕,张继军. 垂直布里奇曼法生长CdZnTe晶体的径向溶质偏析之有限元分析法模拟[J]. 功能材料, 2011, 42(11) |
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| 作者姓名： | 王焱 闵嘉华 梁小燕 张继军 |
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| 作者单位： | 上海大学材料科学与工程学院,上海,200072 |
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| 基金项目： | 国家自然科学基金资助项目(10675080); 上海市重点学科资助项目(S30107) |
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| 摘 要： | 运用有限元分析软件Comsol Multiphys-ics,结合晶体生长固液界面曲率分析法,模拟了垂直布里奇曼法生长Cd0.9Zn0.1Te（CZT）晶体。研究了固液界面处曲率变化对于溶质径向偏析的影响,揭示了界面曲率与溶质偏析的内在关联性,并计算了数值。分析了3种晶体生长方式：（1）坩埚匀速生长;（2）两阶段坩埚变速生长;（3）坩埚回熔生长分别对于溶质偏析的影响。采用扫描电子显微镜SEM中的能谱仪EDX测量3种工艺的Zn组分分布：（1）模拟值比对实验结果发现可以运用固液界面的曲率平均值来推算溶质径向组分偏差的大小;（2）模拟推算的溶质径向偏差值更加接近于实验所得的溶质组分偏差最大值;（3）坩埚回熔生长法生长晶体的固液界面的波动性小,界面稳定性最好,溶质径向组分偏差也最小。
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| 关 键 词： | 材料科学基础学科 数值模拟 径向溶质偏析 曲率 回熔生长 |
Investigation of solute segregation in CZT-LPVB with finite element analysis method |
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| WANG Yan,MIN Jia-hua,LIANG Xiao-yan,ZHANG Ji-jun. Investigation of solute segregation in CZT-LPVB with finite element analysis method[J]. Journal of Functional Materials, 2011, 42(11) |
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| Authors: | WANG Yan MIN Jia-hua LIANG Xiao-yan ZHANG Ji-jun |
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| Affiliation: | WANG Yan,MIN Jia-hua,LIANG Xiao-yan,ZHANG Ji-jun(School of Materials Science and Engineering,Shanghai University,Shanghai 200072,China) |
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| Abstract: | The Cd0.9Zn0.1Te crystal growth(LPVB,low pressure vertical bridgman) was numerically simulated and analyzed by the simulation software of comsol Mutiphysics.The influence of curvature on solid-liquid interface is studied,and the radial solute segregation is calculated.Three kinds of growth methods divided as following:(1) constant velocity;(2) changed velocity,(3) remelting growth are studied on the radial solute segregation.Energy dispersive X-ray detector of scanning electronic microscopy is used to test ... |
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| Keywords: | foundational discipline in materials science numerical simulation radial solute segregation curvature remelting growth |
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