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Digitale Medien

Improvements of microstructural and superconducting properties of Ag-Bi2Sr2CaCu2Ox screen-printed tape by controlled oxygen partial pressure during cooling procedure (1993)

Noji, H. ; Zhou, W. ; Glowacki, B. A. ; [weitere]

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 63 (1993), S. 833-835

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Details

ISSN: 1077-3118

Quelle: AIP Digital Archive

Thema: Physik

Notizen: The effect of different cooling procedures, after sintering, on the microstructural and superconducting properties of Bi2Sr2CaCu2Ox (B-2212) screen-printed tapes has been investigated. It was found that the amorphous phase originally present in grain boundaries at the sintering temperature undergoes a conversion to the Bi-2212 phase during slow cooling. However, the excess oxygen absorbed during slow cooling (in 21% oxygen) disturbs the order and ordering process of Bi-2212 crystals, but if the slow cooling process is conducted under monotonically reduced oxygen partial pressure, to ensure that the optimum oxidation state at sintering temperature of the Bi-2212 phase can be retained during the cooling procedure, tapes are then characterized by narrow grain boundaries and the highest Jc value (approximately-greater-than)104 A/cm2 at 77 K and 0 T.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.109897

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