Open AccessSTUDY ON THE TECHNOLOGY AND PROPERTY FOR Y2BaCuO5 PARTICLE S ARTIFICIAL DOPING TO OBTAIN SINGLE-CRYSTAL DOMAIN MELT-TEXTURED YBCO BULK SUPE RCONDUCTOR
Author(s) -
Sha Jian-jun,
YAO ZHONG-WEN,
YU JIN-NAN,
Yu Gang,
LUO JIN-HAN,
Wen Hai-Hu,
Wanli Yang,
Shiliang Li
Publication year - 2000
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.49.1356
Subject(s) - materials science , scanning electron microscope , superconductivity , microstructure , doping , homogeneous , crystal (programming language) , particle (ecology) , particle size , domain (mathematical analysis) , condensed matter physics , phase (matter) , composite material , optoelectronics , thermodynamics , chemical engineering , physics , oceanography , geology , computer science , engineering , programming language , mathematical analysis , mathematics , quantum mechanics
This paper describes the method of artificial doping Y-211 phase and melt-textur ed growth with a top-seeded technique to prepare the quasi-single crystal domain YBCO bulk materials with various Y-211 particle contents.The specimens obtained have high density (more than 62g/cm3) and good mechanical toughnes s.The Jc of specimens reaches 123×106A/cm2 u nder 06T at 30K and 135×104A/cm2 under 2 T at 70K.The scanning electron microscope observation of specimens indicates that Y-211 part icles can improve the quality of melt-textured YBCO superconductor and reduce th e microcrack of specimens.Combining the microstructures with Jc measu rements shows that the smaller the particle size,the more homogeneous the partic le distribution,the higher the pinning effectiveness.The best ratio of Y-123 to Y-211 for the superconductor specimens is 1∶05 in moles,in which the Y-211 pa rticles are uniformly distributed and their size is about 200nm.