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无偏析碲锌镉单晶体生长过程控制参数的研究 被引量:1

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摘要 计算模拟了加速坩埚旋转技术Bridgman(ACRT-B)法碲锌镉单晶体生长过程,研究了ACRT波形参数对固液界面形状和晶体组分偏析的影响.计算结果表明:ACRT波形参数的变化显著影响固液界面凹陷和界面前沿温度梯度增加的幅度,增加幅度最高可达数倍.坩埚最大转速的增加不能明显改善晶体的径向组分偏析,而坩埚加速时间、恒速转动时间和减速时间的变化可以显著影响溶质的偏析行为.适当的波形参数,ACRT可以显著地减小晶体的径向组分偏析,直至为零.反之,ACRT可显著增加晶体的径向组分偏析和轴向组分偏析.调整ACRT波形参数和生长系统的控制参数,可以制备溶质组分均匀区占较大比率的单晶体.
作者 刘俊成
出处 《中国科学(E辑)》 CSCD 北大核心 2004年第11期1193-1206,共14页 Science in China(Series E)
基金 国家自然科学基金资助项目(批准号:50006016和50372036)
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同被引文献32

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