硝酸盐PAD法快速制备YBCO超导薄膜研究  

Rapid preparation of YBCO superconductive film by the nitrate PAD solution deposition

作　　者：严武卫[1] 张成孝[1] 王鹏飞[1] 金利华[2] 李成山[2] 卢亚锋[2] 

机构地区：[1]陕西师范大学化学与材料科学学院,陕西西安710062 [2]西北有色金属研究院超导材料研究所,陕西西安710016

出　　处：《功能材料》2012年第8期984-987,共4页Journal of Functional Materials

基　　金：国家高技术研究发展计划(863计划)资助项目(2009AA03Z203)

摘　　要：用硝酸盐高分子辅助沉积法(简称PAD)来制备YB2C3O7-x(YBCO)超导薄膜,有着制备速度快、工艺简单和无环境污染等优点。采用硝酸盐水相前驱液,并加入高分子螯合剂和薄膜改性剂,然后将前驱液涂覆在LaAlO3(LAO)单基晶片上,采用快速低温分解,再经过高温烧结制备出完整的YBCO超导薄膜。在1.0×10-4 O2/N2气氛下制备的YBCO超导薄膜致密,YBCO(00l)峰取向明显,没有其它杂相峰,同时,转变起始温度TC=91K,转变宽度ΔTC=2K;在77K、自场下临界电流密度JC为约1MA/cm2。实验结果表明,采用硝酸盐PAD法的低温分解时间比传统的TFA-MOD法缩短9h左右,而且制备出的YBCO超导薄膜性能优良,该方法为以后的长带生产提供了一种新的制备技术。The nitrate-based polymer-assisted deposition （PAD） process for preparation of YB2C3O7-x（YBCO） films has several advantages, including fast, simple and fluorine-free pollution. The aqueous hot solution, which prepared by yttrium-, barium-, copper-nitrates, the polymeric chelants and rheology modifiers, was spin coated onto single crystal LaAlO3 （LAO） substrates. The amount of oxygen during crystallizing strongly influ- ences the superconducting properties after caleinating in only 50min, the c-axis YBCO films in 1.0×10-4 O2/N2 atmosphere had the densification, high YBCO （00/）phase purity and good superconducting properties, such as Tc of 91K （△Tc=2K） and Jc of 1.0MA/cm2 at 77K. The results show that the nitrate PAD processis rapid, with the 9 h reduction during the calcination compared to 10 h of the traditional TFA-MOD, so this new YBCO solution deposition method suggests a route toward inexpensive and commercializable solution deposited YBCO coated conductor.

关 键 词：YBCO PAD 硝酸盐 快速制备 

分 类 号：TM26[一般工业技术—材料科学与工程]