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Titel: Caracterização elétrica e estrutural de cerâmicas supercondutoras BSCCO preparadas com controle granulométrico dos pós precursores
Sonstige Titel: Electric and structural characterization of BSCCO superconductor ceramic prepared with granulometric control of precursors
Verfasser: Carvalho, C.
Dos Santos, Dayse Iara
Rubo, E. A. A.
Aegerter, Michel A.
Sprache: Sonstige
Erscheinungsjahr: 1994
Quelle: Anais / 38° Congresso Brasileiro de Cerâmica; 2° Encontro de Mineradores e Consumidores : [18 a 21 de junho de 1994, Blumenau, SC] / Associação Brasileira de Cerâmica. - Vol. 2. - São Paulo, SP : Associação Brasileira de Cerâmica, 1994, S. 779-783
SWD-Schlagwörter: Hochtemperatursupraleiter
Rasterelektronenmikroskop
Röntgendiffraktometrie
DDC-Sachgruppe: 500 Naturwissenschaften
Dokumentart : InProceedings (Aufsatz / Paper einer Konferenz etc.)
Kurzfassung: -
Results are shown of grain control of powder used in the fabrication of high temperature superconductors (HTSC) pellets. The powder was obtained using co-precopilation of oxalates of the elements composing the Bi:Sr:Ca:Cu:O system, with nominal composition (2:2:2:3). After various calcinations the grains of sizes 40-120 µm were separated using sieves of appropriate mesh. The electric and structural characterization of pellets was made using electrical resistivity technique (DC FOUR PROBE), transport current density, scanning electron microscopy (SEM) and, X-ray diffraction (XRD). The chemical composition was studied with energy dispersive X-ray microanalysis (EDX). The pellets made with grains having average diameter about 40 µm show critical temperature To~=110 K, compatible with the phase (2:2:2:3) and current density about 50 A/cm2 at 5K.
Link zu diesem Datensatz: urn:nbn:de:bsz:291-scidok-23621
hdl:20.500.11880/24232
http://dx.doi.org/10.22028/D291-24176
SciDok-Publikation: 7-Sep-2009
Fakultät: Sonstige Einrichtungen
Fachrichtung: SE - INM Leibniz-Institut für Neue Materialien
Fakultät / Institution:INM
SE - Sonstige Einrichtungen

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