Ic and phase characteristics of (Bi,Pb)2223 tapes after 1 heat treatment in a temperature gradient under different oxygen partial pressures

Author

Young, E.A. ; Yang, Y. ; Beduz, C. ; Riddle, R.

Author_Institution

Sch. of Eng. Sci., Southampton Univ., UK

Volume

11

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

2979

Lastpage

2982

Abstract

The heat treatment of (Bi,Pb)2223 tapes in a furnace with a temperature gradient allows the study of many heat treatment temperatures at the same time. 20 cm lengths of tape were given a typical first heat treatment of a period of 40 hours in a ~1°C/cm temperature gradient under either 7.5% partial pressure O₂, or air. The maximum amount of (Bi,Pb)2223 occurred in a temperature window, (⩽2% change in the phase composition) of about 7°C under 7.5% partial pressure and 2°C under air. The relationship between the phase composition and the transport current, Ic, for both atmospheres is investigated

Keywords

bismuth compounds; calcium compounds; critical currents; heat treatment; high-temperature superconductors; lead compounds; multifilamentary superconductors; strontium compounds; superconducting tapes; (Bi,Pb)2223 tapes; BiPbSrCaCuO; heat treatment; oxygen partial pressures; phase characteristics; temperature gradient; transport current; Atmosphere; Boring; Furnaces; Heat treatment; Optical microscopy; Oxygen; Photonic integrated circuits; Superconducting integrated circuits; Temperature control; X-ray scattering;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.919688

Filename

919688