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Preparation of superconducting BiPbSrCaCuO ceramics by melt casting

✍ Scribed by E. Yanmaz; J.S. Abell; I.R. Harris

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

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✦ Synopsis

Bi-pb-Sr-Ca-Cu-O bulk samples with nominal composition of Bil.6Pb0.4Sr2Ca3Cu4Oy (2234) were prepared by a melt casung method. The melting process was carried out on two different powders; one consisting of the precursor materials, and one in which the precursor had been calci,r,d.Th~-~ffects of the melt-casting on the structure, the phase compositions and the superconducting properties have been investigated in as-cast and annealed materials. It was found that the high-Tc superconducting phase can be formed by annealing at 850"C. The annealed (850"C, 200h) sample of 2234 exhibited superconductivity with a To(zero) of 105K and a critical current density (77K, zero magnetic field) of 113 A.cm -2.

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