期刊
MATERIALS RESEARCH EXPRESS
卷 9, 期 6, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/2053-1591/ac7948
关键词
high temperature superconductor; Bi-2223 phase; ball milling; critical transition temperature; microstructure
资金
- Science and Technology Plan Project of Taizhou [21gya23, 2002gy06]
- Zhejiang Public Welfare Technology Application Research Project [LGC20E010003]
Superconducting Bi-2223 powders were prepared by wet ball milling, resulting in thinner grains compared to hand grinding. The optimal preparation conditions were found, which are crucial for mass production of high-quality single-phase Bi-2223 precursor powders at a lower cost.
Superconducting Bi1.68Pb0.32Sr1.75Ca1.85Cu2.85O10+y (Bi-2223) powders were prepared by a conventional solid-state reaction using hand grinding and wet ball milling. The effects of the ball milling and sintering times on the phase evolution were examined by x-ray diffraction and magnetic susceptibility measurements. Single-phase Bi-2223 powders with a superconducting transition temperature of about 108 K were optimally prepared by wet ball milling for 20 h and sintering at 867 degrees C for 80 h. Finding these optimal preparation conditions were crucial for mass producing high-quality single-phase Bi-2223 precursor powders with a much lower cost of energy. Furthermore, we found that ball milling led to thinner grains than hand grinding.
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