Texturing of high-T-c superconductors

Most of the potential applications of the high-temperature superconductors require large critical currents, much higher than those obtained using a cl assical sintering process. This paper reviews different processes and corre sponding recent results in the field of texturing high-T-c superconductors in order to align and develop the planes where the current flows easily. Di fferent melt-textured growth methods are discussed from both theoretical an d practical viewpoints, and the limitations associated with the diffusion a nd interface phenomena are introduced. Influence of the process parameters, as well as the microstructure of the precursors and the use of additives i n order to enlarge the single domain size and to optimise the superconducti ng characteristics is discussed. Mechanical texturing and texturing under a magnetic field, as well as combination of both processes, are also conside red. Recent results, which appear to be an important breakthrough for the i ndustrial development because of the large crystallization rates are also m entioned.