Abstract
A particular sol-gel process for preparation of BSCCO (2223) powder was devised, settled and tested. Water-in-oil type emulsion technique associated to internal gelation process was chosen, starting from cations' nitrates. Dried powders were calcined for a few minutes at 400°C and then fired at 850°C in steps of 5 h with intermediate grindings: in only 14 h 92% pure (2223) phase was obtained. Powder mean particle size resulted very low (<1 μm) and morphology is characterized by globular grains which are both promising features for subsequent pressure sintering technique. Moreover, the method appears well adaptable to large scale production.
Original language | English (US) |
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Pages (from-to) | 119-126 |
Number of pages | 8 |
Journal | Journal of the European Ceramic Society |
Volume | 20 |
Issue number | 2 |
DOIs | |
State | Published - Feb 2000 |
Keywords
- Oxide superconductors
- Powder-chemical preparation
- Sol-gel processes
ASJC Scopus subject areas
- Ceramics and Composites