CAJ | 학술논문

采用熔融织构生长法（MTG）结合顶部籽晶工艺（TSP）制备了不同Y-211粒子含量的准单畴熔融织构的YBCO块材，样品致密度高，机械强度好。VSM测量结果表明：样品在30K、0.6T下，临界电流密度JC达到1.23×106A/cm2；在70K、2T下，JC为1.35×104A/cm2，且JC对磁场不敏感。SEM分析结果表明：Y-211相的掺杂能够改善织构样品的生长状况，同时，掺杂的Y-211粒子又能作为强的钉扎中心；所制备的样品中Y-211粒子分布越均匀，尺寸越小，其钉扎效果越好。
채용용융직구생장법（MTG）결합정부자정공예（TSP）제비료불동Y-211입자함량적준단주용융직구적YBCO괴재，양품치밀도고，궤계강도호。VSM측량결과표명：양품재30K、0.6T하，림계전류밀도JC체도1.23×106A/cm2；재70K、2T하，JC위1.35×104A/cm2，차JC대자장불민감。SEM분석결과표명：Y-211상적참잡능구개선직구양품적생장상황，동시，참잡적Y-211입자우능작위강적정찰중심；소제비적양품중Y-211입자분포월균균，척촌월소，기정찰효과월호。
The paper describes the method of melt-textured growth(MTG) witha top-seeded technique to prepare the quasi-single crystal domain YBCO bulk materials with various Y-211 particle contents. The obtained specimens have high density and good mechanical toughness. The JC of specimens reaches 1.23×106 A/cm2 under 0.6 T at 30 K and 1.35×104 A/cm2 under 2 T at 70 K. The SEM observation of specimens indicates that Y-211 particles can improve the quality of melt-textured YBCO superconductor. Combining the microstructures with JC measurements shows that the smaller the particle size and the more homogeneous the particle distribution is, the better the pinning effectiveness is.