CAJ | 학술논문

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。
용초산염고분자보조침적법（간칭PAD）래제비YB2C3O7-x（YBCO）초도박막,유착제비속도쾌、공예간단화무배경오염등우점。채용초산염수상전구액,병가입고분자오합제화박막개성제,연후장전구액도복재LaAlO3（LAO）단기정편상,채용쾌속저온분해,재경과고온소결제비출완정적YBCO초도박막。재1.0×10-4 O2/N2기분하제비적YBCO초도박막치밀,YBCO（00l）봉취향명현,몰유기타잡상봉,동시,전변기시온도TC=91K,전변관도ΔTC=2K;재77K、자장하림계전류밀도JC위약1MA/cm2。실험결과표명,채용초산염PAD법적저온분해시간비전통적TFA-MOD법축단9h좌우,이차제비출적YBCO초도박막성능우량,해방법위이후적장대생산제공료일충신적제비기술。
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.