NDLI: Effect of pre-annealing temperature and atmosphere on the microstructure and transport property of Bi-2223/Ag tapes

Content Provider	IEEE Xplore Digital Library
Author	Jiang, C.H. Kumakura, H. Koizumi, T.
Copyright Year	2002
Abstract	The phase assemblage and Bi-2212 texture in Bi-2223/Ag tapes before the heat treatment were varied by pre-annealing the tapes at different temperatures and in pure Ar or air for 10 h. Then all the tapes were isothermally heat treated at 840/spl deg/C in air for 4 cycles with intermediate pressings. The J/sub c/ of the samples pre-annealed in pure Ar were lowered no matter which annealing temperature was used. The best J/sub c/ was obtained in the samples pre-annealed at 800/spl deg/C in air, which was in an average value of 21.7 kA cm/sup -2/, being increased by 25% compared with that of the unannealed tapes (17.3 kA cm/sup -2/). The transport properties of various pre-annealed samples were correlated to the phase evolutions, growth and pre-alignment of Bi-2212 grains during pre-annealing.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	2458
Ending Page	2461
Page Count	4
File Size	2102417
File Format	PDF
ISSN	10518223
Volume Number	15
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Temperature Atmosphere Microstructure Lead Heat treatment Powders Assembly Annealing Argon Oxidation transport properties Bi-2223/Ag tapes microstructure pre-annealing
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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The influence of starting precursors on grain growth, microstructure evolution and J/sub c/ property of Bi-2223/Ag tapes

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