The Effect of Zn Substitution of Ca in BiPbSrCaCuO Superconductors Sintered at 830 degrees C

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KOCABAŞ K., ŞAKİROĞLU S., Ciftcioglu M., Ercan I., EPİK H., BİLGİLİ Ö.

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, cilt.22, sa.8, ss.749-754, 2009 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 22 Sayı: 8
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1007/s10948-009-0491-8
  • Dergi Adı: JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.749-754
  • Anahtar Kelimeler: Bi-based superconductors, Zn substitution, Scanning electronic microscopy, X-ray diffraction, CU-O SYSTEM, PHASE, CERAMICS, (BI, SB, LEAD, PB
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

The effect of partial substitution of Ca by Zn in Bi1.7Pb0.3Sr2Ca2-xZnxCu3Oy at x = 0.00, 0.05, 0.10, 0.15 and 0.20 levels on the electrical and structural properties was investigated in this work. The characterization of the ceramics prepared by the conventional solid-state reaction method were done by resistance-temperature measurements, XRD, SEM and density analysis. Low levels of Zn substitution of Ca caused significant changes in the properties of the ceramics. The low-T-c superconducting properties were enhanced and the fraction of the low-T-c (2212) phase were found to increase at x = 0.15 level of Zn substitution at 830 degrees C sintering temperature. Zero resistance was observed only in sample D with x = 0.15 and the T-c was determined as 92 K. The SEM micrographs and the density analysis have shown that this was the densest packed ceramic.