Acta Phys. -Chim. Sin. ›› 1990, Vol. 6 ›› Issue (05): 519-522.doi: 10.3866/PKU.WHXB19900503

• Communication • Previous Articles     Next Articles

Effects of High Valence Cations Doped on the Phase Formation and the Crstal Structure in the Bi(Pb)-Sr-Ca-Cu-O System

Chen Feng-Xiang; Zhu Wen-Jie; Li Neng; Lin Bing-Xiong; Tang You-Qi; Feng Qing-Rong; Wu Ke; Xue Li-Xin; Zhong Shan-Jin; He Jun   

  1. Department of Chemistry, Peking University, Beijing; Department of Physics, Peking University, Beijing; Department of Chemistry, Guangxi University
  • Received:1990-05-03 Revised:1990-05-31 Published:1990-10-15
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Abstract: The effects of high valence cations M~(n+) (n≥4) doped on the phase formation and the 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 raised and 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 form more rapidly by doping and the single phase with T_c(0)>110 K can be obtained more easily.