NDLI: Transport Properties of Bi-2212 Bulk Superconductors prepared by Melt-Casting Process

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Transport Properties of Bi-2212 Bulk Superconductors prepared by Melt-Casting Process

Content Provider	Semantic Scholar
Author	Tsukamoto, Takehiko Andoh, Hiroya Sugiura, Touko Uno, Tokushirou Takatori, Y. Oota, Akio
Copyright Year	2001
Abstract	Transport Properties of Bi-2212 Bulk Superconductors prepared by Melt-Casting Process Takehiko Tsukamoto, Member, Hiroya Andoh, Non-Member, Touko Sugiura, Non-Member (Toyota National College of Technology) Tokushirou Uno, Student-Member, Yousuke Takatori, Non-Member and Akio Oota, Member (Toyohashi University of Technology) The Bi-2212 bulk superconductors, witha proper amount of SrSO4, were prepared by melt-casting process (MCP). The MCP started with heating of the calcined powders at 1000°C in air until ahomogeneous melt was obtained. The obtained melt was poured into a copper mold to make solid bars. The solid bars were subjected to a heating procedure at 840°C in order to reach the two-CuO layer phase. Finally, the MCP samples were annealed at700°C in air, and rapidly quenched into liquid nitrogen, toensure better homogeneity of the oxygen concentration. The SEM analysis offracture surfaces reveals that he BSCCO grains are plate-like with an apparent length of about 50g m. Critical current in bulk Bi2212 bar( 0 10.7mm) exceeded 50A at 77K in self ield. The weak links have been largely eliminated in the MCP sample, and the zero resistance is observed above 80K. A significant enhancement of transport properties inBi-2212 bulk superconductors has been achieved using MCP. The AC loss value is about one-half of the theoretical v ue obtained by the theory of Norris. This is attributed to the inhomogeneous J., distribution along aradial direction i the sample.
Starting Page	1257
Ending Page	1262
Page Count	6
File Format	PDF HTM / HTML
DOI	10.1541/ieejpes1990.121.10_1257
Volume Number	121
Alternate Webpage(s)	https://www.jstage.jst.go.jp/article/ieejpes1990/121/10/121_10_1257/_pdf/-char/en
Alternate Webpage(s)	https://doi.org/10.1541/ieejpes1990.121.10_1257
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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