Texturation of Bi-based 2212 superconducting bulk ceramics

The magnetic texturing growth (Mag TG) technique has been applied for the first time to 2212 powder (Bi2Sr2Ca0.8Dy0.2Cu 2Oy) in order to obtain well-textured, Bi-based bulk ceramics. The sample has been analyzed by X-ray diffraction analysis, polarized light microscopy, scanning electron microscopy, and EDX analysis. Electric resistivity measurements have also been made. A well-textured sample with an intergrowth of two phases was observed: the expected 2212 superconducting phase sandwiching a non-superconducting Bi-rich phase. The electric transition is quite sharp with a Tc around 87 K. Some further experiments in gold and copper tubes have been performed and offer the possibility of providing well-textured coils.