Open AccessPROPERTIES AND MICROSTRUCTURES OF MELT PROCES-SED (YHo)Ba2Cu3O7-y SUPERCONDUCTOR
Author(s) -
Yongbao Feng,
Lian Zhou
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.41.1880
Subject(s) - materials science , superconductivity , microstructure , melting point , phase (matter) , diffraction , melting temperature , condensed matter physics , composite material , optics , physics , quantum mechanics
We have prepared (YHo) Ba2Cu3O7-y superconductors with hige Jc value by powder melting process (PMP) method. The DTA result shows that the melting temperature of Y-system superconductor can be reduced by Ho addition. The Jc value can be improved and the size of 211 phase can be reduced by Ho substitution. Microstructures and X-ray diffraction pattern indicate that the 123 grains are preferentaially aligned with mutually parallel a-b conductive planes. There are a number of twins and fine 211 particles in the sample. It is also found that many crystal defects exist around the 211 phase. These defects may act as pinning centers.