110K单相Bi系超导体的制备  

Preparation of 110K single phase Bi-bascd superconductor

作　　者：卢亚锋[1] 罗长勋 辛绵荣[1] 吴晓祖[2] 李青云[2] 

机构地区：[1]陕西师范大学物理系 [2]西北有色金属研究院

出　　处：《陕西师大学报（自然科学版）》1992年第2期25-27,共3页Journal of Shaanxi Normal University(Natural Science Edition)

摘　　要：采用普通固态反应法制备了名义组分为 Bi_(2.0-x)Pb_xS_(r1.9)Ca_(2.2)Cu_(3.3)O_y 超导体.对样品进行了物相分析、电阻率及磁化率测量.XRD 分析表明:富 Ca 富Cu 有利于高 T_c 相的形成,并且获得了高 T_c 单相样品。交流磁化率曲线测量表明:样品的低温区转变台阶位于85～95K 之间.且2212相的 T_c 随氧含量、组分、工艺等因素变化.The superconductors with nominal composition of Bi_(2.0-x) Pb_x Sr_(1.9) Ca_(2.2) Cu_(3.3) O_y are prepared by solid-state reaction method.The samples have gone through phase analyzing,the measurments of resistence and a.c.susceptibility.XRD indicates that rich-Ca,Cu is beneficial to form the highcr-Tc phasc;it is of very good quality.The measurment of a.c.susceptibility suggestes that the transition step at a lower temperature rang varied from 85K to 95K.It is believed that ‘2212’ phase's T_c would vary with oxgen content,composition and condition.

关 键 词：超导体 相分析 高TC 铋系 制备 

分 类 号：TM262[一般工业技术—材料科学与工程]