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- W3036626469 abstract "The preparation of high-Tc superconductor Bi-Sr-Ca-Cu-O is difficult because the strict heat treatment is requested. Takano et al. reported that the partial substitution of Pb for Bi in the system increases the volume of the high-Tc phase, namely it relieves the preparation condition of a superconductor both in the composition of starting materials and heating process. In this paper long-period structure and modulated structure in the Bi-Pb-Sr-Ca-Cu-O system is described. Powders of Bi 2 O 3 , PbO, SrCO 3 , CaCO 3 and CuO, which were weighed such that the ratio of Bi:Pb:Sr: Ca:Cu = 0.96:0.15:1:1.1:1.6 (Sample 1), were dissolved in nitric acid. The compound produced by heating and evaporating solvent was ground in an agate mortar and heated in air at 800°C for 12h. After the reaction the mixture was ground again and made as a pellet, which was heated at 850°C for 48h. Other compositions, Bi:Pb:Sr:Ca:Cu = 0.96:0.24:1:1.1:1.6(Sample 2) and =0.7:0.3:1:1:1.8 (Sample 3), were also prepared with the same manner." @default.
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- W3036626469 date "1990-08-01" @default.
- W3036626469 modified "2023-09-27" @default.
- W3036626469 title "Electron Microscopic study of modulated structure in a Bi-Pb-Sr-Ca-Cu-O system" @default.
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- W3036626469 doi "https://doi.org/10.1017/s042482010017356x" @default.
- W3036626469 hasPublicationYear "1990" @default.
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