高价离子掺入Bi(Pb)-Sr-Ca-Cu-O体系对成相和结构的影响  

EFFECTS OF HIGH VALENCE CATIONS DOPED ON THE PHASE FORMATION AND THE CRYSTAL STRUCTURE IN THE Bi(Pb)-Sr-Ca-Cu-O SYSTEM

作　　者：陈凤翔[1] 朱文杰 李能[1] 林炳雄[1] 唐有祺[1] 冯庆荣[2] 吴克[2] 薛立新[2] 钟善锦[3] 何俊[3] 

机构地区：[1]北京大学化学系 [2]北京大学物理系 [3]广西大学化学系

出　　处：《物理化学学报》1990年第5期519-522,共4页Acta Physico-Chimica Sinica

摘　　要：Sunshine等在Bi-Sr-Ca-Cu-O体系中掺入少量Pb^(2+)后,可获得T_(c(0))=110K以“2223”相为主的样品.其后,Shun-ichi、卢伟京等也得到同样的结果,但都需要长达300～500小时烧结,所得到的样品仍含有少量“2212”相、我们拟对Bi(Pb)-Sr-Ca-Cu-O体系掺入高价离子,M^(n+)(n≥4),如Sn^(4+),Sb^(5+),Mo^(6+),W^(6+),研究它们对“2223”成相和结构的影响。The effects of high valence cations M^(n+) (n≥4) doped on the phase formation andthe structure stability have been investigated. In the crystal structure X_2Sr_2Ca_2Cu_3O_(10)(X = Bi_(1-x-y)Pb_xM_y), the high valence cations M^(n+), Bi^(3+), and Pb^(2+) were deter-mined to statistically distribute at the bismuth positions. The bismuth valence is raisedand the positions of oxygen atoms in the (XO_2X) double layers are fully occupied.Conseqently, The structural stability is increased. The phase 2223 was found to formmore rapidly by doping and the single phase with T_c(0)>110K can be obtainedmore easily.

关 键 词：超导材料 铋锶钙铜氧 掺铅 成相 

分 类 号：TM262[一般工业技术—材料科学与工程]