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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
Volume20
Paginazione119-126
ISSN09552219
Parole chiaveCalcination, Ceramic materials, Gelation, Globular grains, Granular materials, Morphology, Oxide superconductors, Particle size analysis, Powders, Pressure sintering method, Sintering, Sol-gels
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. © 2000 Elsevier Science Ltd.

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-0034135503&partnerID=40&md5=e4cac29588e816f7d5e781de812ef070
Citation KeyTampieri2000119