Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 94: Issue 1
Impact of Pb substitution on the formation of high Tc superconducting phase in BSCCO system derived through sol-gel process
Authors:
A. Qureshi PINSTECH Materials Division, Directorate of Technology Islamabad Pakistan

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M. Arshad PINSTECH Chemistry Division, Directorate of Science Islamabad Pakistan

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S. Durrani PINSTECH Materials Division, Directorate of Technology Islamabad Pakistan

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H. Waqas PINSTECH Materials Division, Directorate of Technology Islamabad Pakistan

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Pages:
175–180
Online Publication Date:
15 Aug 2008
Publication Date:
01 Oct 2008
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-007-8915-9
Keywords:
dilatometry; FTIR study; high Tc phase; Pb-BSCCO system; pH effect; sol-gel technique; superconducting phases; VSM; XRD study
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Abstract  

Sol-gel process was employed to synthesize the Pb-BSCCO system having general composition Bi2−xPbxSr2Ca2Cu3O10−δ, where x=0.2, 0.4 and 0.8. Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), dilatometry and vibrating sample magnetometer (VSM) were employed to study the materials produced at different stages. Two-stage heating firstly at 300 and then 800°C was adopted in order to avoid the burning of the materials and formation of carbonates. The carbonate formation was avoided by heating the materials firstly at 300°C for 2 h and without intermediate cooling moved to the furnace having temperature 800°C and hold for 2 h. The sintering behaviour of samples was studied by dilatometry and the results revealed that the sample having x=0.4 was stabled up to a temperature of 700°C while samples having x=0.2 and 0.8 to a temperature of 625°C. The maximum shrinkage was observed at 850°C in all the samples. On the basis of dilatometry results, the samples were sintered at 845°C for 60 h to observe the superconducting phases. The highest volume fraction of high superconducting phase (2223) was noticed in the sample containing x=0.4 having onset Tc=110 K.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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