The investigation of phase evolution in composite ceramic superconductors using Raman microscopy techniques
V.A. Maroni, Arabella Fischer, Kuan-Ting Wu · OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) · 1999
Raman microspectroscopy and imaging techniques have been used to investigate key mechanistic features that influence the formation of layered Bi- and Tl-based superconducting phases during the thermal treatment employed to produce BSCCO and TBCCO composite conductors. Seminal information gained from these studies includes the location of lead-rich nonsuperconducting second phases (NSPS) and the identification of the constituent phases in certain NSP agglomerations that tend to resist dissipation as high-Tc phase formation proceeds to completion.