The microstructure and superconducting properties of Bi-2223/Ag tapes fabricated in the variation-temperature-sintering process during high magnetic fields were investigated. The flat tapes 0.6 mm in thickness and 3 mm in width set on the an isolite holder were sintered in following conditions for 120 h in 10 T magnetic fields in air: (1) isothermal-temperature-sintering at 835 °C, (2) variation-temperature-sintering from 840 to 835 °C, (3) variation-temperature-sintering from 845 to 835 °C, (4) variation- temperature-sintering from 850 to 835 °C, (5) variation-temperature- sintering from 835 to 840 °C. The results show that the tapes variation-temperature-sintered from high temperature to low temperature show stronger c-axis alignment of the Bi-2223 phase and higher Jc value than that isothermal-temperature-sintered and variation-temperature-sintered from low temperature to high temperature. However, the starting temperature (above 850 °C) of the variation-temperature-sintering from high temperature to low temperature is too high, the proportion of Bi-2223 phase decreases largely. The tape variation-temperature-sintered from 845 to 835 °C in a 10 T magnetic fields shows a strong c-axis alignment of the Bi-2223 phase, a high proportion of Bi-2223 phase, and the highest Jc value.
- Critical current density
- Magnetic field sintering
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering