摘要
为提高TFA-MOD工艺制备YBCO薄膜的生产效率,实验采用了丙烯酸盐对传统三氟乙酸盐进行部分替换.由于前驱溶液中氟含量的减少,低温预处理过程升温速率可达到300℃/h;并通过对低温预烧工艺中气氛的调整,避免了增稠剂二乙醇胺的添加对薄膜质量造成的不利影响,使其添加上限达到0.75g/5mL.经过工艺改进,单次涂膜厚度可达到1μm.虽然由于厚度的增加,表面有a轴晶粒出现,但薄膜内部仍具有较优的微观结构.其临界电流密度(Jc)及临界转变温度(Tc)分别达到3.5MA/cm2和90K.
To elevate the productivity of high critical current YBCO superconducting films by TFA-MOD processing,traditional trifluoroacetate（TFA）was replaced by acrylic acetate partially.Since the fluorine content in precursor solution was decreased,the ramping rate in decomposition process reached 300℃/h.Meanwhile the atmosphere was also adjusted to avoid the fatal effect of diethanolamine（DEA）,and to increase thickness of YBCO film.By increasing the maximum of DEA addition to 0.75g/5mL,the thickness of film reaches 1μm.While some a-axis grains dispersed on the film surface are probably ascribed to the rise of thickness,the YBCO film has good interior microstructures overall.As a result,the highest critical current density is 3.5MA/cm2 and the critical temperature is 90K as well.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2010年第9期971-974,共4页
Journal of Inorganic Materials
基金
国家973计划(2006CB601005)
北京市自然科学基金(2072004)
教育部高等学校全国优秀博士学位论文作者专项基金(200331)
北京工业大学111人才工程基金~~
