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李英楠,宁梓旭,米兆垠,吴金秋,齐晓童.一步热处理制备氧化硼掺杂的YBCO超导膜[J].稀有金属材料与工程(英文),2020,49(5):1521~1525.[Li Yingnan,Ning Zixu,Mi Zhaoyin,Wu Jinqiu and Qi Xiaotong.Preparation of Boron Oxide Doped YBCO Superconducting Films by One-step Heat Treatment[J].Rare Metal Materials and Engineering,2020,49(5):1521~1525.]
Preparation of Boron Oxide Doped YBCO Superconducting Films by One-step Heat Treatment
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Received:December 13, 2018  Revised:January 28, 2019
Key words: YBCO  boric acid  boron oxide
Foundation item:国家级大学生创新创业训练计划 (201810145086 )
Author NameAffiliation
Li Yingnan,Ning Zixu,Mi Zhaoyin,Wu Jinqiu and Qi Xiaotong  
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      In order to improve the efficiency of chemical preparation of YBa2Cu3O7?δ (YBCO) with long taps, the pyrolysis of traditional process preparing precursor film needs to be reduced to one step, so the crystallization process should be directly connected to the former without the cooling of pyrolysis. Replacing copper trifluoroacetate with copper isooctanate can alleviate the centralized heat release and the contraction of the precursor film during pyrolysis. A suitable amount of boric acid was added into the precursor solution with total cation concentration of 1.0 mol/L, after a continuous heat treatment YBCO superconducting film was obtained. Utilizing the flow state of boric acid at 200-500 ℃, boron oxide was doped into YBCO film which shows denser and smoother by filling some pores, compared with that one prepared by undoped precursor solution under the same conditions, the former shows higher superconductivity.