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In this paper, the Y145 superconductor doped Ag2O were synthesized by solid state reaction. The calcinations and sintering temperature were at 920 °C and annealing temperature was at 550 °C. The highest critical temperature was in Y145+0.1Ag sample with Tc onset at 96 K and the lowest was found in pure Y145 at 95 K. We found that the surface of Y145 superconductor was improved by Ag adding on the porous structure.

In this paper . W e synthesized Y134 superconductor doped Ag2O by solid state reaction and investigated the effect of Ag2O addition on the critical temperature of Y134 superconductor and SEM micrographs shown Y134 doped Ag2O has rather smooth and small pores feature . The maximum critical temperature found at an optimal doping ,0.1 Ag, with Tc onset =97 K.

We investigated some properties of Y134 superconductor doped Ti superconductor. The series of samples of Y134 doped Titanium (YBa3Cu4TixO9-δ) which x=0, 0.05, 0.10, 0.15, 0.20, 0.25 were prepared by solid state reaction method with calcinations and sintering temperature at 980 °C. The porosity was reduced and the melting area were found for all Ti-doped samples. There was a little effect of Ti-doped on Tc onset but the lower of Tc offset were found that agree with the melting found on surface of sample with Ti-doped. The peritectic temperature of Y134 powder, and Y134 + 0.10Ti were on the same range about with more peak area of pure Y134 than Y134 with Ti-doping.