| Yazarlar |
Mustafa Yılmazlar
Sakarya Üniversitesi, Türkiye |
|
Hacı Ali Çetinkara
Mustafa Kemal Üniversitesi, Türkiye |
|
M Nursoy
|
Prof. Dr. Özgür ÖZTÜRK
Kastamonu Üniversitesi, Türkiye |
|
Cabir Terzioğlu
Abant İzzet Baysal Üniversitesi, Türkiye |
| Özet |
| In this work, Bi1.6Pb0.4Sr2Ca2-xSmx Cu3Oy (x = 0.0000, 0.0005, 0.0010, 0.0050, 0.0100, 0.1000, 0.5000, 1.0000, 1.5000) superconductors were prepared by conventional solid-state reaction method. The effect of the substitution of Sm for Ca in the high-Tc phase Bi-2223 was investigated by DTA, thermal expansion coefficient, Vickers microhardness, XRD and SEM analysis. The lattice constants and volume fractions are estimated from XRD analysis. The thermal expansion coefficient, the microhardness, the volume fraction, and the lattice constants strongly depend on the Sm content of the samples. XRD data show that the high-Tc phase decreases and the low-Tc phase increase as the Sm substitution changes from x = 0.0-1.5. The coefficients of thermal expansion (in the range of 30-800 °C) of the pure (x = 0.0) and high doped (x = 1.5) samples were 7.90 × 10-7 and 5.70 × 10-7 °C-1, respectively. The results of Vickers hardness measurements varied between 0.254 and 0.623 GPa as increasing the Sm concentration. © 2006 Elsevier B.V. All rights reserved. |
| Anahtar Kelimeler |
| thermal expansion coefficient,DTA,Vickers hardness |
| Makale Türü | Özgün Makale |
| Makale Alt Türü | SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale |
| Dergi Adı | Physica C: Superconductivity |
| Dergi ISSN | 0921-4534 |
| Dergi Tarandığı Indeksler | SCI |
| Makale Dili | İngilizce |
| Basım Tarihi | 08-2006 |
| Cilt No | 442 |
| Sayı | 2 |
| Sayfalar | 101 / 107 |
| Doi Numarası | 10.1016/j.physc.2006.04.093 |
| Makale Linki | http://linkinghub.elsevier.com/retrieve/pii/S0921453406004369 |
| Atıf Sayıları | |
| WoS | 69 |
| SCOPUS | 71 |
| Google Scholar | 89 |
| Google Scholar | 89 |
