中文摘要：

提出了一种低氟溶液制备REBa2Cu3O7-x（REBCO）超导薄膜的方法。以醋酸盐为原料,二乙烯三胺、丙烯酸、三氟乙酸为反应物,甲醇为溶剂,制备了含有无氟RE盐（RE=Y、Yb、Nd）,无氟Cu盐和含氟Ba盐的低氟REBCO前驱溶液。该溶液中氟含量只有传统的All-TFA溶液中氟含量的30%。利用该溶液制备REBCO薄膜,减少了热分解过程中HF气体的释放量,缩短了热分解周期。利用X射线小角掠射对薄膜热分解过程进行了分析,结果表明,低氟化学溶液法所得凝胶膜在热分解后,形成了RExBayFz化合物,避免了BaCO3相的形成,从而可获得高性能的REBCO薄膜。

英文摘要：

A new low-fluorine solution was developed to prepare REBa2Cu3O7-x（RE=Y,Nd,Yb） superconducting films. Using acetates as raw materials,acrylic acid,diethylenetriamine,and trifluoroacetic acid as reactants,methanol as solvent,low-fluorine REBa2Cu3O7-x precursor solutions containing fluorine-free RE-salts,Cu-salts and fluorinated Ba-salts,were obtained. Compared with the traditional All-TFA solution,due to the lower fluorine content in the precursor solution,lower amount of HF gas was released during the pyrolysis process and thus shortened pyrolysis process was achieved. Low-angle X-ray diffraction indicates that RExBayFz compound is formed in the pyrolyzed films derived from the low-fluorine solutions,which prevents the formation of BaCO3 and benefits the growth of high-quality REBa2Cu3O7-x superconducting films.