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Bi(Pb)-Sr-Ca-Cu-O (2223) superconductor prepared by improved sol-gel technique

TitoloBi(Pb)-Sr-Ca-Cu-O (2223) superconductor prepared by improved sol-gel technique
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione2000
AutoriTampieri, A., Celotti G., Lesca S., Bezzi G., La Torretta Teresa M. G., and Magnani G.
RivistaJournal of the European Ceramic Society
Parole chiaveCalcination, Ceramic materials, Gelation, Globular grains, Granular materials, Morphology, Oxide superconductors, Particle size analysis, Powders, Pressure sintering method, Sintering, Sol-gels

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. © 2000 Elsevier Science Ltd.


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Citation KeyTampieri2000119