C-Axis Oriented Y-Ba-Cu-O Oxide Superconductor

C-axis oriented bulk samples in Y-Ba-Cu-O system have been prepared by the uniaxial pressing technique with various pre-sintering temperatures and pressures. The c-axis orientation by pressing was compared with that of highly c-axis oriented films made by the sol-gel method. Suitable starting compositions and sintering temperatures for preparing c-axis oriented samples were similar in both techniques. The origin of the c-axis orientation was attributed to the growth of plate crystals under the partial melting condition in the sintering process.