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Influence of calcination atmosphere on the phase evolution mechanism of Bi-2223 high temperature superconductor
- Source :
- Journal of Materials Science: Materials in Electronics. 31:12333-12344
- Publication Year :
- 2020
- Publisher :
- Springer Science and Business Media LLC, 2020.
-
Abstract
- Precursor powders of Bi2Sr2Ca2Cu3O10+δ (Bi-2223) high temperature superconducting tapes were prepared with spray pyrolysis technique. By tuning the oxygen partial pressure in calcination atmosphere as 1.0%, 7.5%, and 10.0%, respectively, the influences of calcination atmosphere on the phase evolution dynamics during the precursor powders calcination process have been discussed. Then the optimal calcination temperatures have been obtained correspondingly. Moreover, Bi-2223 multi-filament tapes have been fabricated with the precursor powders calcinated under different atmosphere. The effects of precursor powder calcination parameters on the phase composition, microstructures as well as the current capacity of final tapes have been systematically studied. Due to the proper secondary phase content and enhanced Bi-2223 texture structures, the maximum critical current of 109 A at 77 K, self-field, corresponding to the critical current density of 23.3 kA cm−2 has been obtained with the oxygen partial pressure of 7.5% in calcination atmosphere and the calcination temperature of 790 °C.
- Subjects :
- 010302 applied physics
Materials science
High-temperature superconductivity
High temperature superconducting
Partial pressure
Condensed Matter Physics
Microstructure
01 natural sciences
Phase evolution
Atomic and Molecular Physics, and Optics
Electronic, Optical and Magnetic Materials
law.invention
Atmosphere
Chemical engineering
law
0103 physical sciences
Calcination
Texture (crystalline)
Electrical and Electronic Engineering
Subjects
Details
- ISSN :
- 1573482X and 09574522
- Volume :
- 31
- Database :
- OpenAIRE
- Journal :
- Journal of Materials Science: Materials in Electronics
- Accession number :
- edsair.doi...........07b08e26884b5cf669e4514dd8b1c39f