超导相(Bi_(1.7)Pb_(0.2)In_(0.1))Sr_2Ca_2Cu_3O_(10)的制备和晶体结构研究  

PREPARATIVE AND STRUCTURAL STUDIES ON THE SUPERCONDUCTING PHASE (Bi_(1.7)Pb_(0.2)In_(0.1)) Sr_2Ca_2Cu_3O_(10)

作　　者：朱文杰[1] 陈凤翔[1] 李宏宇[1] 田丰[1] 周鼎元[1] 郑香苗[1] 林炳雄[1] 唐有祺[1] 

机构地区：[1]北京大学物理化学研究所应用物化研究室

出　　处：《物理化学学报》1989年第5期516-519,共4页Acta Physico-Chimica Sinica

摘　　要：Bi-Sr-Ca-Cu-O体系的掺杂可以改善超导性能和消除堆垛层错。由于铋氧双层的作用还未能很好地了解,我们合成X_2Sr_2Ca_2Cu_3O_(10)的纯相,[X为(Bi_(0.85)Ph_(0.1)In_(0.05)]以确定其是(XOXO)还是(XO_2X),以及如何影响晶体结构,超导性质和生成机理。合成和鉴定CaCO_3、SrO、CuO的混合物于900℃烧结20hr得到Sr_2Ca_2Cu_3O_7,然后与Bi_2O_3、PbO按摩尔比1∶0.87∶0.3混匀,压片,于870℃加热20hr,重新研磨,在880℃加热30hr,再加0.6%mol In_2O_3,于890℃烧结20hr,然后在空气中淬火,样品表面部分微熔。The superconducting phase(Bi_(1.7)Pb_(0.2)In_(0.1))Sr_2Ca_2Cu_3O_(10) with on-set T_c near 112K and zero resistivity at 95K has been prepared. The Unit cell is. body-centered tetragonal, space group I4/mmm, a=3. 817(1)A, c=37.04(1)A. Chemical substitution of Pb and In in Bi-Sr-Ca-Cu-O series results in the growth of 2223 phase. The superconductivity and the formation mechanism are associated with the structural features.

关 键 词：超导体 铋锶钙铜氧 晶体结构 

分 类 号：TM262[一般工业技术—材料科学与工程]