NDLI: Fabrication of Y-Ba-Cu-O superconductor for magnetic bearing

Content Provider	IEEE Xplore Digital Library
Author	Itoh, M. Ishigaki, H. Hida, A.
Copyright Year	1965
Abstract	Although high-T/sub c/ oxide superconductors, such as Y-Ba-Cu-O, should have great potential for application to repulsive magnetic bearings, various kinds of improvements on the mechanical and electrical properties of the materials are needed. The authors tried to improve these properties by changing compression pressure in the process used in forming a pellet systematically and by adding Ag powder to Y-Ba-Cu-O powder. All materials used here were confirmed as Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7/ by X-ray diffraction analysis. It was found that density, hardness, temperature of zero resistance, and ratio of resistivity at a temperature of 300 K and that at a temperature of 100 K increase as the compression pressure becomes higher. On the other hand, a temperature of resistance drop and a repulsive force due to the Meissner effect were insensitive to the pressure. The Ag content in the pellets makes the temperature of zero resistance higher. It was also found that the ratio of resistivity had possible use as a criterion for better superconductive characteristics.<>
Sponsorship	IEEE Magnetics Society
Starting Page	2518
Ending Page	2521
Page Count	4
File Size	367016
File Format	PDF
ISSN	00189464
Volume Number	25
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1989-03-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Fabrication Yttrium barium copper oxide Magnetic levitation Temperature Magnetic materials Superconducting materials Powders Conductivity Magnetic properties Mechanical factors
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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Compatibility of Nd and Ba in YBa/sub 2/Cu/sub 3/O/sub y/ superconductor

Phase transformations in melt-spun Y-Ba-Cu-O bulk superconductor

Fabrication and microwave properties of Y-Ba-Cu-O and Bi-Ca-Sr-Cu-O thin films

Microstructure and Superconducting Properties of Single Grains of Y-Ba-Cu-O Containing Y-2411(M) and ${rm Y}_{2}{rm O}_{3}$

Synchronous rotation of a floating magnet and flux penetration in Y-Ba-Cu-O superconductor

Effect of Sol-Gel Derived Nano-Scale ${hbox{Y}}_{2}{hbox{Ba}}_{4}{hbox{CuAgO}}_{rm y}$ Addition in Bulk Y-Ba-Cu-O Superconductors

Electrical motor with bulk Y-Ba-Cu-O pellets

Fabrication of Ca-doped large grain Y-Ba-Cu-O superconductors

Preparation of Y-Ba-Cu-O and Bi-Sr-Ca-Cu-O thin films

Fabrication of Y-Ba-Cu-O superconductor for magnetic bearing

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Compatibility of Nd and Ba in YBa/sub 2/Cu/sub 3/O/sub y/ superconductor

Phase transformations in melt-spun Y-Ba-Cu-O bulk superconductor

Fabrication and microwave properties of Y-Ba-Cu-O and Bi-Ca-Sr-Cu-O thin films

Microstructure and Superconducting Properties of Single Grains of Y-Ba-Cu-O Containing Y-2411(M) and ${rm Y}_{2}{rm O}_{3}$

Synchronous rotation of a floating magnet and flux penetration in Y-Ba-Cu-O superconductor

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