[第四章固体中的扩散2-副本.pptVIP

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[第四章固体中的扩散2-副本.ppt

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[第四章固体中的扩散2-副本

Basic features Diffusion is accompanied by reaction or phase transformation. In general, diffusion is rate-determining step while reaction take place instantaneously. For diffusion in binary systems there appear only a series of single phase, one adjacent to another, while mixed phase zone doesn’t appear. Concentrating changes abruptly at phase boundary. The phase boundaries and the width of each phase change parabolic ally with time. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Reaction Diffusion dynamics 1. Speed of interface Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 2. Phase width Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 例子3：Fe中掺N Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 例子4：薄膜太阳能电池CIGS CIGS薄膜太阳能电池结构黄铜矿结构 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. CIGS薄膜材料的制备方法真空工艺：多源共蒸发法溅射后硒化法分子束外延法化学气相沉积非真空工艺：电化学沉积旋涂涂布法丝网印刷法喷墨打印法 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 硒化机理实时原位X-衍射实验证明最重要的三个反应方程式 (A) CuSe+InSe =CuInSe2 (B) Cu2Se+2InSe+Se=2 CuInSe2 (C) Cu2Se+In2Se3=2 CuInSe2 Journal of Solid State Chemistry 179 (2006) 2394–2415 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. CuInSe2 phase formation during Cu2Se/In2Se3 interdiffusion reaction Pseudobinary phase diagram of the Cu2Se and In2Se3 system BSE image of Cu2Se/In2Se3 reaction couple annealed at 550 °C for 1.5 h, Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. the enlargement of the