摘要
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 High-T. Superconducting fibers have been successfuly prepared by means of the Laser-Heated Pedestal Growth (LHPG) method. The samples show good stability and technological repeatability. The typical fiber sample is 400 mm × 35μm in size with obvious flexibility. The onset transition temperature of fibers is 118 K and zero resistance temperature is 87 K, Jc. (77 K) = 2 500 A/cm2. The prevailing phase in the fibers is the low-Tc phase (85 K phase). The fibers contain a-axis texture with strongly preferred orintation which mainly demonstrated along with the fibers axis. The structure and properties of the fibers are closely related to growth conditions and heat treatment.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1990年第4期10-16,共7页
Journal of Tsinghua University(Science and Technology)
关键词
高TC
超导体
超导纤维
电流密度
high temperature superconductor, BiSrCaCuO system. superconducting fiber, critical current density
