On the substitution of bismuth by antimony in the system Bi-Sr-Ca-Cu-O

This work concerns the results obtained during attempts of substitution of bismuth by antimony in superconductors Bi-cuprates family. The samples, prepared by dry way, from oxides and carbonates of the corresponding elements, are characterized by IR spectroscopy, X ray diffraction and differential thermal analysis. In every case, two domains appear: - for antimony concentration lower than 50 %, the main phase is isotype with the yellow phase Bi2Sr3CaO7. - for a concentration between 50% and 100%, we systematically obtain a perovskite isotype with Sr1.45Sb0.55O3-y.