$YBa_2Cu_3O_{7-x}$ superconductor powders have been prepared by the Liquid Phase Reaction(LPR) method. It turns out that the LPR method is more useful thatn the solid state reaction method in view of chemical homogeneity and purity, which have greatly affected by ball milling. Especially, we could conjectured that this method was very efficient due to the use of metal salts as solute and acetic acids as solvent from the aspect of cost.
The optimum stock solution obtained after stirring and intermittent mixing. XRD studies show that the calcined powders can be obtained at 920℃ after 3 hour calcination. In the case of a sample sintered at 970℃ for 3 hours. We observe a preferred orientation tendency. Also, the specimen is shown to have homogeneous distribution of Y, Ba, Cu atoms. Its plate-like grains revealed the 123 composition according to EDAX analysis. Finally, critical temperature and critical current density have been measured for the sintered ceramic superconductor specimens, which show critical temperatures ranging between 88-90 K. The critical temperatures of individual specimens are observed to be dependent on the heat treatment condition.
