SR6V2O11 AS POSSIBLE RESISTIVE BARRIER FOR HIGH TEMPERATURE SUPERCONDUCTORS CABLES PROCESSING
Résumé
In the innovative resistive barrier concept for the processing of high temperature superconducting cables, several mixed oxides have been claimed as promising materials. Amongst them, earth zirconates have been tested and recent development concerns Sr6V2O11. In addition to a high stability, the conditions for use of these barriers include good deformation properties and chemical homogeneity. Sol-gel methods of preparation using acrylamide as polymerisant agents may fulfill these requirements in particular because they produce after calcination, systems with a very fine granulometry. Here we present the compared formation and preparation of submicrometric BaZrO3, SrZrO3 and Sr6V2O11 obtained by sol-gel technique and analysed by means of differential temperature analysis and high temperature X-ray diffraction.