研究目的
Investigating the effect of sintering time and the addition of nano-sized MgO on the transport critical current density (Jc) of Bi1.6Pb0.4Sr2Ca2Cu3O10(MgO)x/Ag superconductor tapes.
研究成果
The addition of nano-sized MgO improves the transport critical current density (Jc) of Bi1.6Pb0.4Sr2Ca2Cu3O10(MgO)x/Ag superconductor tapes, with 50 nm MgO showing a higher Jc than 70 nm MgO. Sintering for 100 h results in higher Jc values compared to 50 h. The improvement in Jc is attributed to increased flux pinning potential and microstructural enhancements due to the nano-sized MgO addition.
研究不足
The study is limited to the effects of 50 and 70 nm MgO nanoparticles and sintering times of 50 and 100 h on the transport critical current density of the specified superconductor tapes. The findings may not be generalizable to other nanoparticle sizes or sintering conditions.
1：Experimental Design and Method Selection:
The study involved the addition of 50 and 70 nm MgO nanoparticles into Bi
2：6Pb4Sr2Ca2Cu3O10(MgO)x/Ag superconductor tapes, followed by sintering at 845 oC for 50 and 100 h. The transport critical current density (Jc) was measured under various conditions. Sample Selection and Data Sources:
The samples were prepared with and without MgO nanoparticles to compare their effects on Jc.
3：List of Experimental Equipment and Materials:
X-ray diffraction method and scanning electron microscopy were used to examine the phase and microstructure of the tapes.
4：Experimental Procedures and Operational Workflow:
The tapes were sintered at 845 oC for 50 and 100 h, and Jc was measured in zero-field between 30 and 77 K and under magnetic fields at 77 K.
5：Data Analysis Methods:
The results were analyzed to determine the effect of MgO nanoparticle size and sintering time on Jc.
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