Material for resistive barriers in Bi-2223/Ag tapes

P. Kovc, I. Husek, W. Pachla, M. Diantoro, G. Bonfait, J. Maria, K. Frhlich, L. Kopera, R. Diduszko, A. Presz

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

The reactivities of several oxide materials (OM) in direct contact with BSCCO powder has been tested at a temperature of approximately 845°C in air. The OM such as BaZrO3, SrCO3, MgO and ZrO2 showing little or no reactivity with BSCCO were mixed (10 wt%) with a BSCCO precursor powder and used for monocore tapes made by a standard powder-in-tube technique. The microstructure of the BSCCO+OM cores was analysed by SEM and XRD and the transport current properties-critical current, pinning force and resistance up to 16 T-were measured as a function of the magnetic field for various orientations with respect to the ab plane. The OM used influenced the electrical properties of the Bi-2223 phase in different ways. This is because the oxides react with BSCCO during the heat treatment and simultaneously affect the 2212 → 2223 phase transformation as well as the Bi-2223 grain growth and grain connectivity. Submicrometre commercial SrCO3 powder was evaluated as the best material from all those tested, for resistive barriers in Bi-2223/Ag tapes.

Original languageEnglish
Pages (from-to)966-972
Number of pages7
JournalSuperconductor Science and Technology
Volume14
Issue number11
DOIs
Publication statusPublished - 1 Nov 2001

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