Studies into the phase transformation of Bi-2223 precursor powders using X-ray diffraction and SQUID susceptibility measurements

Author

Gundakaram, R. ; Chang, S.C. ; Liu, R.S. ; Woodall, L. ; Gerards, M.

Author_Institution

Mater. Chem. Lab., Nat. Taiwan Univ., Taipei, Taiwan

Volume

11

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

3182

Lastpage

3185

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_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

Keywords

X-ray diffraction; bismuth compounds; calcium compounds; high-temperature superconductors; magnetic susceptibility; solid-state phase transformations; strontium compounds; Bi-2223 precursor powders; Bi₂Sr₂Ca₂Cu₃O₁₀; SQUID susceptibility; X-ray diffraction; high temperature superconductor; magnetic susceptibilities; phase transformation; powder quality; powder-in-tube tapes; Biomedical measurements; Bismuth; Heat treatment; Phase measurement; Powders; SQUIDs; Superconducting materials; Superconducting transition temperature; Superconductivity; X-ray diffraction;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.919739

Filename

919739