MOD法YBCO超导薄膜制备中BaCeO_3的形成  

Formation of BaCeO_3 during Preparation Process of YBCO Superconducting Layer by MOD Method

作　　者：吕昭[1] 刘敏[1] 叶帅[1] 吴紫平[1] 徐燕[1] 索红莉[1] 

机构地区：[1]北京工业大学材料科学与工程学院新型功能材料教育部重点实验室,北京100124

出　　处：《人工晶体学报》2010年第6期1555-1558,共4页Journal of Synthetic Crystals

基　　金：国家重点基础研究发展计划(973)(2006CB601005)资助项目;国家高技术研究发展计划(863)(2009AA032401)资助项目;国家自然科学基金(50771003;50802004)资助项目;北京市自然科学基金(2092006)资助项目

摘　　要：本文采用金属有机盐沉积(MOD)方法,在钇稳定氧化锆(YSZ)单晶上依次制备了CeO2过渡层和YBCO超导层,测得其Tc,onset值为90.5 K,Jc值为1.3 MA/cm2。在沉积YBa2Cu3O7-x(YBCO)过程中发现薄膜中生成了BaCeO3相,继而对该相的生成条件及其对YBCO性能的影响进行了研究。结果表明BaCeO3是在YBCO相生成之后,CeO2与YBCO反应生成的,且以MOD方法制备的YBCO薄膜时难以避免BaCeO3相的产生。In this paper,CeO2 buffer layer and YBCO superconducting layer were deposited on the yttrium stabilized zirconia（YSZ） single crystal by metal organic deposition（MOD） method.The values of Tc and Jc of the YBCO film were 90.5 K and 1.3 MA/cm2,respectively,it＇s indicated that high performance YBCO film was obtained.But BaCeO3 phase was found in YBCO/CeO2/YSZ film.Then,the formation condition of BaCeO3 and its influence on the superconducting performance of YBCO were investigated.The results revealed that BaCeO3 is formed after the synthesis of YBCO phase,and BaCeO3 is the product of the reaction between CeO2 and YBCO,and BaCeO3 phase is inevitable during the process of YBCO films by MOD method.

关 键 词：超导薄膜 前驱液 YBCO MOD BACEO3 

分 类 号：TM26[一般工业技术—材料科学与工程]