One-Step Synthesis and Densification of Bulk YBa2Cu4O8/Ni Composite Superconductors-Reference-Cited by-同舟云学术

One-Step Synthesis and Densification of Bulk YBa2Cu4O8/Ni Composite Superconductors

Published:1989 Issue: Volume:169 Page:
ISSN:0272-9172
Container-title:MRS Proceedings
language:en
Short-container-title:MRS Proc.

Author:

Gélinas C.,Champagne B.

Abstract

The fabrication of bulk YBa2Cu307-x/metal composite superconductors is not easy because of the oxygen-temperature dependence of the YBa2Cu307-x phase (the socalled 123 phase). A loss of oxygen occurs during consolidation of these composites at high temperature and it is almost impossible to diffuse oxygen through the metallic envelope into the densified compound to restore the required oxygen content for superconductivity above 77K. To overcome this drawback, a one-step synthesis and consolidation process was used to produce YBa2Cu4O8/ nickel composites. The superconductive 124 phase has a more stable oxygen stoichiometry [1] and is synthesized under a high oxygen pressure at high temperature.

Publisher

Springer Science and Business Media LLC

Subject

General Engineering

Reference5 articles.

1. Eight new high-temperature superconductors with the 1:2:4 structure

2. High-pressure phase diagrams (1–3000 bar oxygen) of the (Y-Ba-Cu-O)-O2 systems

3. Two new bulk superconducting phases in the Y-Ba-Cu-O system: YBa2Cu3.5O7 + x (Tc ≈ 40 K) and YBa2Cu4O8 + x (Tc ≈ 80 K)

4. 4 Morris D.E. , “Synthesis and properties of the 2:4:7 superconductors R2Ba4Cu7015–x (R = Y, Eu, Gd, Dy, Ho, Er)”, (to be published).

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1. Interactions of various substrates with melted ErBa2Cu3Ox;Superconductor Science and Technology;1992-08-01