Study of different chemical methods to prepare ceramic high-temperature superconductors

摘要

The preparation of precursors of bulk YBa2Cu3O7-delta, Bi2Sr2CaCu2O8+delta and YBa2Cu4O8 materials by coprecipitation-filtration of hydroxides or oxalates and sol-gel techniques is presented. Their properties are compared with those of products prepared by the conventional solid-state reaction method by means of TGA, FTIR, XRD, SEM, EDX and resistivity measurements. [References: 15]