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首页> 外文期刊>Journal of Crystal Growth >On crucible effects during the growth of cadmium zinc telluride in an electrodynamic gradient freeze furnace
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On crucible effects during the growth of cadmium zinc telluride in an electrodynamic gradient freeze furnace

机译：电动梯度冷冻炉中碲化镉锌生长过程中的坩埚效应

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摘要

The CrysMAS code of the Crystal Growth Laboratory, Fraunhofer IISB, is applied to reveal conditions occurring in electrodynamic gradient freeze furnaces during the growth of cadmium zinc telluride crystals. Of particular interest are heat transfer and growth conditions associated with crucibles of different design, one constructed of graphite and the other of pyrolytic boron nitride (PBN). Under identical furnace set-point schedules, the two systems exhibit very different behaviors. Specifically, the temperature field through the cone region of the PBN crucible displays much steeper axial thermal profiles and promotes convex solid-liquid interface shapes (rather than the concave shapes computed for the graphite crucible). Both systems exhibit a concave interface during growth through the cylindrical part of the crucible. However, the axial thermal profile through the graphite-crucible charge is considerably more offset from the set-point profile of the furnace due to significant axial heat flows through the crucible walls. These factors argue in favor of the PBN crucible; however, comparatively larger radial gradients in the PBN system could lead to higher dislocation levels.
机译：晶体生长实验室的Fraunhofer IISB的CrysMAS代码用于揭示碲化镉锌晶体生长过程中电动梯度冷冻炉中发生的条件。特别令人感兴趣的是与不同设计的坩埚相关的传热和生长条件，其中一个坩埚由石墨制成，另一个由热解氮化硼（PBN）制成。在相同的熔炉设定点时间表下，这两个系统表现出截然不同的行为。具体地说，穿过PBN坩埚圆锥区域的温度场显示出更陡峭的轴向热分布，并促进了凸形的固液界面形状（而不是为石墨坩埚计算的凹形形状）。在通过坩埚的圆柱形部分生长期间，两个系统都呈现出凹形界面。然而，由于大量的轴向热量流过坩埚壁，因此通过石墨坩埚装料的轴向热分布与炉子的设定点分布的偏差更大。这些因素都支持PBN坩埚。然而，PBN系统中相对较大的径向梯度可能导致更高的位错水平。

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  • 来源
    《Journal of Crystal Growth》 |2009年第8期|2327-2335|共9页
  • 作者

    David Gasperino; Mary Bliss; Kelly Jones; Kelvin Lynn; Jeffrey J. Derby;

  • 作者单位

    Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455-0132, USA;

    Radiological and Chemical Sciences, Pacific Northwest National Laboratory, Richland, WA 99352, USA;

    School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164-2920, USA;

    School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164-2920, USA;

    Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455-0132, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    A1. Computer simulation; A1. Convection; A1. Heat transfer; A2. Bridgman technique; A2. Growth from melt; B1. Cadmium compounds;

    机译：A1。计算机仿真;A1。对流;A1。传播热量;A2。布里奇曼技术;A2。从熔体中生长;B1。镉化合物;

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