Open AccessPHASE TRANSFORMATION AND SUPERCONDUCTIVITY OF 110K SUPERCONDUCTOR IN (Bi, Pb)-Sr-Ca-Cu-O SYSTEM
Author(s) -
Xianhui Chen,
Zuyao Chen,
Yitai Qian,
Gu Zhen-Tian,
Cheng Xiang-ai,
Jingjie Sha,
Keqin Wang,
Qirui Zhang
Publication year - 1991
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.40.297
Subject(s) - superconductivity , condensed matter physics , phase (matter) , materials science , quenching (fluorescence) , crystallite , high temperature superconductivity , analytical chemistry (journal) , chemistry , physics , metallurgy , chromatography , optics , organic chemistry , fluorescence
High-quality single phase polycrystalline sample of 110K superconductor (Bi,Pb)2Sr2Ca2Cu3Oy was prepared, the temperature of zero resistance of which is 107K. In this paper, the formation and transformation of the 2201, 2212 and 2223 phase, and the influence of quenching temperature are discussed. The measurement of complex susceptibility shows the strength of Josephson coupling among the superconducting grains depends on the process of sample preparation. The specific heat jump is △c(107K) =5.3J/molK, and the Sommerfeld cntant is γ = 34.6mJ/molK. The specific heat jump is related to the heat treatment of samples strongly. The eletron diffraction analysis and measurement of the oxygen content of these samples are made. The relationship between the oxygen content and the superconducting volume fraction is also discussed.