High critical current density in grainhyphen;oriented bulk YBa2Cu3Oxprocessed by partial melt growth

摘要

A uniform grainhyphen;oriented microstructure was developed in 50hyphen;mmhyphen;long bar samples of bulk YBa2Cu3Oxprepared by a partial melt growth process. In sharp contrast to previous reports, the textured products contained only small amounts of second phases. The samples were dense and nearly free of porosity. Transport measurements showed that the textured samples could carry a critical current density greater than 4.4times;104A/cm2at 77 K and 1.8 T. The possible effects of processing parameters on the superconducting properties of the tested materials are discussed.