img
Structural electrical and mechanical properties of selenium doped thallium based high temperature superconductors   
Yazarlar
Şükrü Çavdar
Gazi Üniversitesi, Türkiye
N Kol
Prof. Dr. Özgür ÖZTÜRK Prof. Dr. Özgür ÖZTÜRK
Kastamonu Üniversitesi, Türkiye
Doç. Dr. Elif AŞIKUZUN TOKEŞER Doç. Dr. Elif AŞIKUZUN TOKEŞER
Kastamonu Üniversitesi, Türkiye
Prof. Dr. Ahmet Tolga TAŞÇI Prof. Dr. Ahmet Tolga TAŞÇI
Kastamonu Üniversitesi, Türkiye
Özet
In this study, highly-refined chemical powders were synthesized by having them ready in appropriate stoichiometric proportions with conventional solid state reaction method so that they would produce the superconductor TlPb0.3Sr2Ca1-xSexCu2Oy (x = 0; 0.4; 0.6; 1.0). This study aims to understand effect of the selenium doping on the superconducting, structural and mechanical properties of the aforementioned superconducting material. The effect of the doping rates on the structural and electrical properties of the sample has been identified. Electrical characteristics of the TlPb0.3Sr2Ca1-xSexCu2Oy material were measured using standard four point probe method. Structural characteristics were examined with the powder X-ray diffractometer (XRD) and scanning electron microscope (SEM). Mechanical properties were analyzed with Vickers microhardness measurements on the sample surface. According to the results, it was observed that the reflection comes from the (00l) and parallel planes increased with Se doping. Particle size increases with increasing doping ratio. According to results of the mechanical measurements, all samples exhibit indentation size effect (ISE) behavior. Comparing the obtained results with theoretical studies, it was understood that Hays Kendall approach is the best method in determination of mechanical properties and analyzing microhardness of the materials.
Anahtar Kelimeler
Resistivity | Se doping | Vickers microhardness | XRD
Makale Türü Özgün Makale
Makale Alt Türü SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale
Dergi Adı Cryogenics
Dergi ISSN 0011-2275
Dergi Tarandığı Indeksler SCI-Expanded
Makale Dili İngilizce
Basım Tarihi 01-2016
Cilt No 73
Sayı 1
Sayfalar 1 / 7
Doi Numarası 10.1016/j.cryogenics.2015.10.019
Makale Linki http://linkinghub.elsevier.com/retrieve/pii/S0011227515001459