【摘要】 用无氟化学溶液法在YGdBCO带材超导层表面制备YBCO超导焊料，研究高温热处理对焊料结构和带材超导性能的影响。结果表明，将非晶前驱膜在795℃烧结1 h可获得(103)衍射峰较强且晶粒均匀分布的YBCO多晶膜。将多晶膜在820℃烧结30 min后可将其转化为具有(00l)取向的YBCO单晶膜即焊料。将表面有YBCO单晶膜的带材氧退火热处理后，其临界电流I_c与原带材接近，表明超导焊料的生长不影响带材的超导电性。更多还原

【Abstract】 YBCO superconducting solders were prepared on YGdBCO superconducting layers of tapes by fluorine-free chemical solution method. The effect of high temperature heat treatment on the structure of solders and superconducting properties of tape was investigated. The results show that the YBCO polycrystalline film with strong(103) diffraction peak and uniform grain distribution was obtained by sintering the amorphous precursor film at 795℃ for 1 h. Then the polycrystalline film was transformed into YBCO single crystal film(solder) with(00l) orientation after sintering it at 820℃ for 30 min. After annealing in oxygen, the critical current I_c of the tape deposited with YBCO single crystal film is close to that of the original tape, indicating no obvious influence of the growth of superconducting solder on the superconductivity of the tape.更多还原