Synthesis of TlCaBaCuO superconductors

Synthesis of TlCaBaCuO superconductors

Starting compositions of Tl 2Ca 2Ba 2Cu 3O x, TlCa 2Ba 2Cu 3O x, and TlCa 3BaCu 3O x were used to synthesize TlCaBaCuO superconductors. The atmosphere was pure oxygen of pressure 10 5 to 6 × 10 5 Pa, and the temperature range was 890 to 940°C. Chemical analysis, X-ray diffraction, differential t...

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Veröffentlicht in:Materials research bulletin 1990-01, Vol.25 (6), p.791-798
Hauptverfasser: Goretta, K.C., Chen, J.G., Chen, Nan, Hash, M.C., Shi, Donglu
Format: Artikel
Sprache:eng
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Zusammenfassung:Starting compositions of Tl 2Ca 2Ba 2Cu 3O x, TlCa 2Ba 2Cu 3O x, and TlCa 3BaCu 3O x were used to synthesize TlCaBaCuO superconductors. The atmosphere was pure oxygen of pressure 10 5 to 6 × 10 5 Pa, and the temperature range was 890 to 940°C. Chemical analysis, X-ray diffraction, differential thermal analysis, scanning electron microscopy, and resistivity and magnetic susceptibility measurements revealed that the TlCa 3BaCu 3O x composition formed the most phase pure compound. The highest T c was 120 K.
ISSN:0025-5408
1873-4227
DOI:10.1016/0025-5408(90)90208-J