Experience in producing high-temperature superconducting ceramics (HTSC) attests to considerable difficulty in achieving productivity of pieces with enhanced parameters. On one hand, this is due to the complex structure of HTSC materials and the high sensitivity of their critical parameters to structural changes. On the other hand, it is due to a need for stringent control over the production regimes for these materials. The present work refines the parameters for producing HTSC ceramic pieces from the system Y2O3-BaO-CuO for the entire process cycle, including the processes of grinding, synthesis, shaping, and sintering. Starting components were high-purity oxides of yttrium and copper, and analytical grade barium carbonate. The effect of initial charge composition on the completeness of product yield was studied. It was found that the most single-phase reaction product is produced with the charge in the form of granules. The amount of superconducting phase (SC) in the preforms was somewhat larger than for the granules, but more impurity phases were also present.
ASJC Scopus subject areas
- Ceramics and Composites