论文部分内容阅读
用激光加热小基座法（ＬＨＰＧ）成功地制备出 ＢｉＳｒＣａＣｕＯ超导纤维。它性能稳 定，工艺可重复性高。纤维最大长度达 ６０ ｍｍ，直径范围为 ３５～５００ μｍ。其中细径纤 维有挠性。超导纤维的起始转变温度为 １１８ Ｋ，零电阻温度为 ８７ Ｋ，临界电流密度Ｊｃ 为 ２５００Ａ／ｃｍ２ （７７， Ｈ＝０，直流电测量）。纤维中超导相主要为低温相（２２１２相）， 显微结构有典型的取向性。纤维的超导电性与其生长条件及后处理过程密切相关。首次 指出，ａ轴平行于纤维的轴向。
BiSrCaCuO superconducting fibers were successfully prepared by laser heating small base method (LHPG). It has stable performance and high process repeatability. The maximum fiber length is 60 mm and the diameter range is 35 to 500 μm. Small diameter fiber flexibility. The initial transition temperature of the superconducting fiber is 118 K, the zero-resistance temperature is 87 K, and the critical current density Jc is 2500 A / cm2 (77, H = 0, DC measurement). The superconducting phase in the fiber is mainly the low temperature phase (2212 phase), and the microstructure has a typical orientation. The superconductivity of fibers is closely related to their growth conditions and post-treatment process. For the first time, it is pointed out that the a-axis is parallel to the axial direction of the fiber.