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Influence of precursors in the Bi-superconductors preparation

✍ Scribed by A. Castro; R. Enjalbert; D. Esparza; J. Galy; I. Rasines; M.L. Rovetta

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
124 KB
Volume
185-189
Category
Article
ISSN
0921-4534

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✦ Synopsis

The best results for the preparation of the oxide 8il.~2PbtSrl.8Ca2.2Cu2.85010.v were obtained using Bi6Pb2Oll and very short sintering periods. Other precursor, Sr2_zNazCaCu205. x, led to good-quality single-crystals of Bi2_yTeySr2_zNazCaCu208.q (O < y < 0.3; O < z < 0.5). X-ray diffraction studies on these superconductors reveal small structural changes for different preparative conditions•

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Influence of precursor calcination param
Influence of precursor calcination parameters on the critical current density of Bi-2212 superconductors
✍ D. Sager; L.P. Meier; L.J. Gauckler; M. Chen 📂 Article 📅 2006 🏛 Elsevier Science 🌐 English ⚖ 795 KB

Partial melt-processed Bi 2 Sr 2 Ca 1 Cu 2 O 8+d (Bi-2212) materials have low critical current densities (j c ) when made from precursors where melting occurred during the calcination. In this paper, the origin of melt formation during calcination of a stoichiometric Bi:2, Sr:2, Ca:1, Cu:2 mixture o