Nanocrystal materials have their special properties because of very small grain size.Nanocrystal superconductors were prepared by crystallizing the amorphous slices with nominal composition of Bi_(1.6)Pb_(0.4)Sr_2Ca_4Cu_5O_x at certain temperature.The measurements of R-Tcurve and x data prove all the crystallized samples have superconducting transition though their Meissner effect is weak.All the nanocrystal superconductors are mainly constituent of Bi_2Sr_2CaCu_2O_y phase by the analysis of X-ray diffraction.
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