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The effect of Ag addition on the crystal growth has been investigated in Bi cuprate superconductors. Bi(Pb)-Sr-Ca-Cu-Ag-O superconducting thin films were prepared by the RF sputtering method. the XRD pattern shows that these films are amorphous before annealing. Dispersed isolated atoms of Ag grow up to a pure metallic sphere of Ag during annealing. Neither silver alloy nor silver compound is formed. This was confirmed by EPMA and XRD. The lattice parameter c of the matrix does not change with increasing Ag content

The intensity ratio of the X-ray characteristic lines L α to K β ,L α /K β decreases exponentially with increasing Cu valence.In ordre to obtain the correct results,we need to make a correction owing to the effects of atomic number,absorption and fluorescence(ZAF correction).The valences of Cu in high-T c oxide superconductors Ba 2 NdCu 3 O 7-δ and Bi 2 Sr 2 CaCu 2 O 8+δ are estimated