Malaysian Journal of Analytical Sciences Vol 22 No 3 (2018): 477 - 482

DOI: 10.17576/mjas-2018-2203-15

 

 

 

THE EFFECTS OF FE-DOPING ON MECHANICAL PROPERTIES IN Bi_1.6Pb_0.4Sr₂Ca₂Cu_3-XFe_XO_Y SUPERCONDUCTOR

 

(Kesan Dop Ferum Terhadap Sifat Superkonduktor Bi_1.6Pb_0.4Sr₂Ca₂Cu_3-xFe_xO_y)

 

Suazlina Mat Ali¹, Azhan Hashim²*, Syamsyir Akmal Senawi², Azman Kasim², Wan Aizuddin Wan Razali², Ruziana Mohamed²,  Fairuzdzah Ahmad Lothfy²

 

¹Faculty of Applied Sciences,

Universiti Teknologi MARA Shah Alam, 40450 Shah Alam, Selangor, Malaysia

²Faculty of Applied Sciences,

Universiti Teknologi MARA Pahang, 26400 Bandar Jengka, Pahang, Malaysia

 

*Corresponding author:  dazhan@pahang.uitm.edu.my

 

 

Received: 4 December 2016; Accepted: 1 December 2017

 

 

Abstract

Bi-2223 superconductors doped with Fe₂O₃ at Cu-site were prepared in bulk form using high purity oxide powders via solid state reaction technique with intermediate grinding. The series of Fe stoichiometric ratio (x = 0.00, 0.02, 0.04, 0.06, 0.08 and 0.10) are systematically added to Bi_1.6Pb_0.4Sr₂Ca₂Cu_3-xFe_xO_y system to study the effect of Fe doping on mechanical and superconducting system properties. Vickers hardness, electrical resistivity, X-ray diffraction and Field Emission Scanning Electron Microscopy have been carried out to assess the effects of Fe doping. These measurements indicate that the Fe doping decreased the critical temperature and deteriorated formation of high T_c phase, compared to undoped sample. Grain size of the samples were also reduced by increasing the amount of Fe and the mechanical properties were found to be escalate with the increasing of Fe concentration.

 

Keywords:  BSCCO superconductor, Fe-doped, critical current density, X-ray diffraction, microhardness

 

Abstrak

Superkonduktor Bi-2223 dop Fe₂O₃ dikawasan kuprum telah dihasilkan secara pukal menggunakan serbuk oksida tulin dengan kisaran perantara melalui kaedah tindak balas keadaan pepejal. Nisbah stokiometri bersiri (x = 0.00, 0.02, 0.04, 0.06, 0.08 and 0.10) ditambah secara sistematik terhadap sistem Bi_1.6Pb_0.4Sr₂Ca₂Cu_3-xFe_xO_y bagi mengkaji kesan dop Fe terhadap sifat mekanikal dan sistem superkonduktor. Ujian ketahanan Vickers, kerintangan arus, pembelauan Sinar-X dan mikroskopi imbasan elektron pancaran medan telah dilakukan bagi menilai kesan dop Fe. Pencirian ini menunjukkan bahawa kesan dop yang dilakukan mengurangkan suhu genting dan merencatkan pembentukan fasa suhu tinggi berbanding sampel tanpa dop. Saiz butiran sampel turut mengecil dengan penambahan jumlah kehadiran Fe dan sifat mekanikal didapati meningkat seiring dengan penambahan Fe.

 

Kata kunci:  Superkonduktor BSCCO, dop-Fe, ketumpatan arus, pembelauan sinar-X, ketahanan mikro

 

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