(钇钡铜氧/异质层)n多层超导膜的离位制备及研究

项目名称： (钇钡铜氧/异质层)n多层超导膜的离位制备及研究

项目编号： No.51202124

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 无机非金属材料学科

项目作者： 黄荣厦

作者单位： 清华大学

项目金额： 25万元

中文摘要： 第二代高温超导带材大规模应用的关键之一是带材制备的低成本化。采用低成本的金属有机物沉积(MOD)方法制备双轴织构超导层是目前国际上的研究热点。增加超导层厚度并且不减少临界电流密度值（Jc）也是降低成本的有效方案，但对于超导层而言，普遍存在临界电流密度随着膜厚度的增加而迅速下降，即存在临界电流密度厚度依赖效应。本项目主要研究YBCO超导多层膜，采用MOD和MOD/磁控溅射沉积相结合的方法，通过多次镀膜的方式制备（YBCO/异质层）n结构的超导多层膜。主要研究内容包括调整前驱溶液配方和前驱溶液处理工艺、选取合适的异质层材料及其镀膜方法、膜的热解和成相工艺、显微结构与超导性能之间的关系以及超导多层膜的生长机制等。旨在减小临界电流密度厚度依赖效应，提高YBCO膜的厚度和临界电流。本项目的实施可为第二代高温超导带材的低成本制备奠定基础。

中文关键词： 多层超导膜；金属有机物沉积；临界电流；临界电流密度；异质层

英文摘要： Low-cost manufacturing is one of the keys of the large-scale application of second-generation HTS tapes. Metal-organic deposition (MOD) method is the research hotspot for preparing biaxial texture superconductor layer. Increasing the thickness of superconductor layer without decreasing critical current density (Jc) is also an effective way to reduce the cost of second-generation HTS tapes. However, it is a prevalence phenomenon that Jc rapidly decline when the thickness of superconductor layer increased. It is the critical current density depending thickness effect. In this project, we focus on the properties and preparation of YBCO superconducting multilayer. (YBCO/heterolayer)n multilayer superconducting films will be prepared by repeatedly coating with MOD and/or MOD/magnetic sputtering deposition method. The research contents contains adjusting the treatment process of the precursor solution and the precursor solution formula, selecting appropriate materials of heterolayer and its coating method, controlling correlative heat treatment. The relationship between microstructure and superconducting properties and the growth mechanism of (YBCO/heterolayer)n superconducting multilayer films would be systematically investigated. The aim of this project is to increase the critical current and the thickness of superc

英文关键词： Superconductive Multilayer Films；MOD；Critical Current；Critical Current Density；Heterolayer