Abstract
The fraction of the 110-K phase in the Bi-Sr-Ca-Cu-O compound is rapidly increased if small amounts of Pb are incorporated in the compound. The maximum ${T}_{c}(R=0)$ of 106 K was obtained after a sintering treatment of several days at 860\ifmmode^\circ\else\textdegree\fi{}C. Computer-generated powder diffraction patterns showed, when compared to the measured ones, the possibility for Pb to occupy Ca or Bi sites.
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