Title :
XRD Rietveld-analysis of PBSCCO-2223 precursor powders used in OPIT processing: Pb2+ solubility in 2212
Author :
Räth, Sebastian ; Woodall, Lee ; Lehmann, Martin ; Gerards, Michael ; Schmahl, Wolfgang Wilhelm
Author_Institution :
Inst. fur Geol., Miner. und Geophys., Ruhr-Univ., Bochum, Germany
fDate :
3/1/2001 12:00:00 AM
Abstract :
The phase assemblage in PBSCCO precursor powders for 2223-OPIT production has been investigated in a quantitative way with Rietveld analysis of x-ray powder diffractograms. The investigated precursors were made by spray pyrolysis of solutions of the appropriate bulk chemical composition of Pb0.33Bi1.80Sr1.87 Ca2.00Cu3.00O10 +δ , and subsequent calcination to remove volatile elements and to form a suitable precursor phase assemblage at temperatures between 800°C and 820°C, in air or under reducing conditions. The influence of temperature and atmosphere on the powder quality was investigated with regard to different minor phases, and the Pb-content of the 2212-phase
Keywords :
X-ray diffraction; bismuth compounds; calcium compounds; heat treatment; high-temperature superconductors; lead compounds; powder technology; strontium compounds; (PbBi)2Sr2Ca2Cu3O; (PbBi)2Sr2CaCu2O; 800 to 820 degC; HTSC precursor powders; OPIT processing; Pb-content; Pb2+ solubility; Rietveld-analysis; X-ray powder diffractograms; XRD; calcination; phase assemblage; powder quality; precursor powders; spray pyrolysis; Assembly; Bismuth; Chemical elements; Powders; Production; Spraying; Strontium; Temperature; X-ray diffraction; X-ray scattering;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
