Solid State Science and Technology, Vol. 19, No 1 (2011) 6-14

ISSN 0128-7389

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

 

EFFECT OF Zr ADDITION ON Bi1.6Pb0.4Sr2Ca2Cu3Oδ SUPERCONDUCTOR

H. Azhan*, F. Fariesha and S. Khalida 

Universiti Teknologi Mara Pahang

26400 Bandar Jengka, Pahang, Malaysia

 

ABSTRACT

The effect of Zr doping on 2223 phase of BSCCO system with general formula of Bi1.6Pb0.4Sr2Ca2Cu3OδZrX has been studied via XRD and resistance measurement to  determine its crystalline structure and critical temperature, TC respectively. All samples  were prepared using conventional solid state reaction technique that involved a series of  mixing and grinding. Generally, all samples exhibit metallic behaviour above TC onset  (>108K except in x = 0.2 where TC onset ~ 80K). A single-step features was observed in  all samples except in x = 0.15 and x = 0.2. The zero resistance temperature, TC(R=0)  decreased as the content of Zr was increased with the Zr-free recorded the highest value  at 100 K while the lowest TC(R=0) was recorded in x = 0.2 with 56 K. The ZrO2 was  incorporated into the crystalline structure of BSCCO system in all samples except for  x = 0.15 and x = 0.2. A few peaks of ZrO2 were detected in the samples. The volume  for fraction of 2223:2212 in samples x =0.00 – x =0.10 is approximately 74:26 but  drastically decreased to 38:72 in x = 0.15 and x = 0.20. The crystallographic structure  remains in tetragonal form where a = b ≠ c. The c-lattice that plays an important role of  superconducting properties was not significantly affected by the Zr addition up to x =0.10. However the c-lattice decreased in other samples.

 

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