The Effects of Mg Substitution in Bi-2223 Superconductors

KOCABAŞ K., Ozkan O., BİLGİLİ Ö., Kadioglu Y., YILMAZ H.

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, cilt.23, sa.8, ss.1485-1492, 2010 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 23 Sayı: 8
  • Basım Tarihi: 2010
  • Doi Numarası: 10.1007/s10948-010-0800-2
  • Dergi Adı: JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1485-1492
  • Anahtar Kelimeler: High-T-c superconductors, Mg substitution, Bi-2223, X-ray diffraction (XRD), (BI,PB)-2223 PHASE, SINTERING PROCESS, HIGH-TC, SYSTEM, CU, AG2O
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

The effects of Mg substitution in Bi-2223 superconductor system has been studied for the Bi1.7Pb0.3Sr2Ca2Cu3-x Mg (x) O (y) nominal composition (x=0.00, 0.05, 0.10, 0.15 and 0.20) which was prepared by the conventional solid-state reaction. The properties of these compounds have been investigated by measuring the electrical resistivity, X-ray diffraction (XRD) and density. Also, scanning electron microscopy (SEM) was employed to investigate the surface microstructure of the samples. It has been found that the effects of Mg substitution support the development of both the Bi-2212 and Bi-2223 phases. These measurements and analyses enable us to discuss the effects of Mg dopant on superconducting properties. We found that onset critical temperatures (T (c, onset)) decrease with addition x > 0.10 in resistivity measurements. The presence of Mg influenced the microstructure of the samples and decreased the mean grain size of Bi-2223 grains up to x=0.10.