Abstract
The effect of Ag addition (0-100 wt%) to Bi2-xPbxSr2Ca2Cu3Oy (x=0.1-1.0) was systematically studied using differential thermal analysis (DTA), electrical resistivity, change in inductance, scanning electron microscopy (SEM) and X-ray diffraction (XRD) studies. The sample was prepared by the optimum thermal procedure in which the sintering was done at the endothermic peak temperature judging from the DTA curve. It was found that the 110 K phase was produced with good reproducibility by the lowering of the melting temperature due to the addition of Ag. It was also found that high-Tc (end) corresponded well to the high-Tc fraction m= Sigma H/( Sigma H+ Sigma L+ Sigma l) (H: 2223, L: 2212, l: Ca2PbO4, Ca2CuO3) defined from the result of XRD measurements.
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