金属有机化学溶液法REBa 2 Cu 3 O 7-x 超导涂层导体的厚度效应和人工钉扎性能

发布时间：2021-11-22 18:25

　　自高温超导材料被发现以来,其高载流能力在电力系统中的应用前景吸引了人们广泛关注。超导在电力方面应用的关键问题是获得低成本、高临界电流的线带材。近年来基于薄膜外延技术发展起来的REBa₂CuO_7-x（REBCO）涂层导体（即第二代高温超导带材）已经在全球范围内正在以不同技术路线逐步实现产业化批量化制备。高品质REBa₂Cu₃O_7-x超导膜的制造工艺,如脉冲激光沉积（PLD）,共蒸发（CE）,化学气相沉积（CVD）液相外延（LPE）和金属有机沉积（MOD）等的研究已经取得了重大进展。这些制备方法可以产生高取向度的超导薄膜,并获得了高性能涂层导体。在不同沉积工艺中,不降低临界电流密度的情况下实现膜厚度的有效增加,均是一个重要的研究问题。MOD是实现涂层导体低成本、批量化制备非常有优势的途径之一。目前,国内外研究团队在这方面已经做了很多工作,采用该方法获得的超导临界电流已经达到了300-500 A/cm（77K,自场）。在MRI、能量存储系统、发电机、发动机、电缆、超导线材和带材、加速... 

【文章来源】：上海大学上海市 211工程院校

【文章页数】：126 页

【学位级别】：博士

【文章目录】：
摘要
ABSTRACT
Chapter 1. Introduction and Literature Review
    1.1 Brief History of Superconductivity
        1.1.1 Introduction to superconductor
        1.1.2 Type of superconductors
        1.1.3 Pinning mechanism in type Ⅱ superconductors
    1.2 Key Issues for Improving Properties of YBa_2Cu_3O_(7-x)
        1.2.1 Dependence of critical current density on film thickness
        1.2.2 Vortex pinning in YBa_2Cu_3O_(7-x) films
        1.2.3 Weak superconducting coupling across grain boundaries
    1.3 REBa_2Cu_3O_(7-x) superconductor coated conductors
    1.4 REBa_2Cu_3O_(7-x) Thin Film Growth Technology
        1.4.1 Physical methods
        1.4.2 Chemical methods
Chapter 2.Experimental Method and Characterization Techniques
    2.1 Motivation
    2.2 Preparation of REBa_2Cu_3O_(7-x) Coated Conductors
    2.3 Techniques of Characterization and Measurements
        2.3.1 Microstructure characterization
        2.3.2 Superconducting properties
Chapter 3. Thick REBa_2Cu_3O_(7-x) Superconducting Films by Single Coating of Low-Fluorine MOD
    3.1 Introduction
    3.2 Experimental Details
    3.3 Structural Analysis
    3.4 The Superconducting Properties
    3.5 Summary
Chapter 4. Enhanced Flux Pinning in YBaCuO_(7-x) Films with Co-Doping SrZrO_3 and Dy_2O_3 Nanoparticles
    4.1 Introduction
    4.2 Experimental Details
    4.3 Structural Analysis
    4.4 Superconducting Properties
        4.4.1 Self-field performance
        4.4.2 In-field performance
    4.5 Summary
Chapter 5. Artificial Bilayers of YDy_(0.5)Ba_2Cu_3O_(7-δ) with SrZrO_3 and BaZrO_3 Interlayers
    5.1 Introduction
    5.2 Experimental Details
    5.3 Structural Analysis
    5.4 The Superconducting Properties
        5.4.1 Self-filed performance
        5.4.2 In-field properties
    5.5 Summary
Chapter 6. Artificial Bilayers of YDyBCO+Dy211/ YDyBCO
    6.1 Introduction
    6.2 Experiment Details
    6.3 Structural Analysis
    6.4 Superconducting Properties
        6.4.1 Self-field performance
        6.4.2 In-field properties
    6.5 Summary
Chapter 7. Conclusions and Further Work Proposed
    7.1 Conclusions
    7.2 Further Work Proposed
REFERENCES
AUTHOR PUBLICATIONS
ACKNOWLEDGEMENTS


【参考文献】：
期刊论文
[1]SUPERCONDUCTIVITY ABOVE LIQUID NITROGEN TEMPERATURE IN Ba-Y-Cu OXIDES[J]. 赵忠贤,陈立泉,杨乾声,黄玉珍,陈赓华,唐汝明,刘贵荣,崔长庚,陈烈,王连忠,郭树权,李山林,毕建清.  Science Bulletin. 1987(10)



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