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Effects of Pt Doping on Microstructure of YBa2Cu3Ox Superconductor Prepared by Directional Solidification

YBa2Cu3Ox superconductor was prepared by directional solidification of Y2BaCuO5–BaCuO2–CuO–Pt powder mixture. Pt doping produced a microstructure which contained fine Y2BaCuO5 particles in textured YBa2Cu3Ox grains. The same effect was not observed when a Pt wire was inserted in the sample instead of powders. Energy-dispersive X-ray spectroscopy (EDS) revealed that a compound containing Ba–Cu–Pt was formed around the wire as well as around the powders. The compound was identified as Ba4Pt1+x Cu2-x O9-z .