Open AccessSUPERCONDUCTIVITY OF RICH-Ca,Cu Bi(Pb)-Sr- Ca-Cu-O SYSTEM
Author(s) -
卢亚锋,
吴晓祖,
李青云,
周廉,
辛绵荣,
罗长勋
Publication year - 1992
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.41.1157
Subject(s) - materials science , sintering , annealing (glass) , crystallite , superconductivity , analytical chemistry (journal) , phase (matter) , atmospheric temperature range , high temperature superconductivity , copper , single phase , mineralogy , metallurgy , condensed matter physics , thermodynamics , chemistry , physics , organic chemistry , engineering , chromatography , electrical engineering
The superconductors with nominal composition of Bi2.0-xPbxSr1.9Ca2.2Cu3.3Oy were prepared by solid-state reaction method, XRD patterns were systematically studied for the samples. The results indicated that rich-Ca, Cu could accelerate the formation of (2223) phase, and broaden the sintering temperature range for a single phase. High-quality polycrystalline sample of 110K single phase was obtained. Annealing at lower temperature is beneficial to increase the volume ratio of 110K phase.