Studies into the phase transformation of Bi-2223 precursor powders using x-ray diffraction and SQUID susceptibility measurements
Journal
Ieee Transactions on Applied Superconductivity
Journal Volume
11
Journal Issue
1
Pages
3182-3185
Date Issued
2001
Author(s)
Abstract
An optimized processing route for formation of the Bi-2223 phase, from a highly reactive precursor powder, is of obvious importance in achieving a high J/sub c/ in powder-in-tube (PIT) tapes, Here, we report the dependence of the SQUID susceptibility signal on the phase content and heat-treatment of the Bi-2223 precursor powders. Magnetic susceptibilities as measured by SQUID reveal differences in the powder quality not seen by x-ray powder diffraction. In particular, Bi-2223 detection is enhanced using SQUID. The rate of phase transformation to the 2223 phase in various precursor powders exhibiting significantly different SQUID signals will be discussed.
SDGs
Type
journal article