采用无氟MOD法在织构金属基带上生长YBCO超导薄膜的研究  

Growth of YBCO Superconducting Film on Textured Metallic Substrate by Fluorine Free MOD Method

作　　者：权雪玲 储静远 赵跃[1] QUAN Xue-ling;CHU Jing-yuan;ZHAO Yue(School of Electronic Information and Electrical Engineering,Shanghai Jiaotong University,Shanghai 200240,China)

机构地区：[1]上海交通大学电子信息与电气工程学院,上海200240

出　　处：《人工晶体学报》2018年第11期2398-2402,共5页Journal of Synthetic Crystals

摘　　要：由于高的使用温度,优良的载流能力以及强的电机械性能,潜在的价格优势,基于YBCO超导薄膜的第二代高温超导带材在电力系统和磁体领域有良好的应用前景。无氟金属有机盐沉积技术具备设备成本低、晶体生长速率快、环境友好等特点,近年来成为了研究制备YBCO超导薄膜技术路线的热点。本文采用FF-MOD技术在Ce O2/IBAD-MgO/Y2O3/Al2O3/Hastelloy C276金属基带上制备200 nm厚的YBCO薄膜,并系统地研究了高温成相过程中Ba CO3、YBCO以及YBCO分解相的显微结构及其对超导电性的影响。结果表明,生成的YBCO相晶体呈随机取向,在热处理的过程中逐渐再结晶成为具有双轴织构的YBCO,这与单晶结果相一致。另外,影响YBCO外延形核和生长的关键是控制烧结温度和烧结气氛中的氧分压,抑制Ba CO3形成,避免YBCO部分分解。Owning to the high operating temperature,excellent current carrying capacity,strong electro-mechanical properties and potential low-price,YBCO based the second generation high temperature superconducting tapes have great application prospects in the field of power system and magnetic applications.Fluorine-free organometallic decomposition technology is an environmentally friendly preparation route for YBCO deposition with a low-cost equipment investment and rapid crystal growth rate,and which is highlighted recently.YBCO thin films with thickness of 200 nm were prepared on CeO2/IBAD-MgO/Y2O3/Al2O3/Hastelloy C276 metal substrates by FF-MOD technique.The microstructures of BaCO3,YBCO and YBCO decomposition phases and their effects on superconductivity were systematically studied during high temperature phase formation.The experimental results show that the YBCO crystals are randomly oriented and gradually recrystallized into YBCO with biaxial texture during heat treatment,which is consistent with the results of single crystal.In addition,the key to the nucleation and growth of YBCO epitaxy is to control the sintering temperature and oxygen partial pressure in the sintering atmosphere,to inhibit the formation of BaCO 3 and avoid the partial decomposition of YBCO.

关 键 词：第二代高温超导带材 YBCO 界面反应 无氟MOD法 

分 类 号：TM43[电气工程—电器]