Synthesis of lead-based 1212 and 3212 superconductors by an aqueous sol-gel method

• Authors: Giedre Nenartaviciene , Ramunas Skaudzius , Rimantas Raudonis , Aivaras Kareiva
• Languages of publication: EN

Abstracts

EN

The aqueous sol-gel synthesis technique for the preparation of (Pb,Sr)Sr2(Y,Ca)Cu2O7±x (Pb-1212) and (Pb2,Cu)Sr2(Y,Ca)Cu2O8±x (Pb-3212) superconductors using two different complexing agents, namely 1,2-ethanediol and tartaric acid was studied. The phase transformations, composition and micro-structural features in the polycrystalline samples were studied by powder X-ray diffraction analysis (XRD), infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). XRD analysis of the ceramic samples obtained by calcination of Pb-Sr-Y-Ca-Cu-O acetate-glycolate precursor gels in air, for 10 hours at 800°C and at 825°C, showed the presence of homogeneous Pb-1212 and Pb-3212 crystallites as major phases. The XRD patterns of the ceramics obtained from Pb-Sr-Y-Ca-Cu-O acetate-tartrate precursor gels, however, showed multiphasic character. The critical temperature of superconductivity (TC (onset)) observed by resistivity measurements were found to be 91 K and 75 K for Pb-1212 and Pb-3212 samples, respectively. [...]

Keywords

EN

Ceramics; Superconducting materials; Chemical synthesis; Sol-gel growth

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2009
• Volume: 7
• Issue: 3
• Pages: 362-368

Dates

published

1 - 9 - 2009

online

21 - 6 - 2009

Contributors

author

Giedre Nenartaviciene

• Department of General and Inorganic Chemistry, Vilnius University, LT-03225, Vilnius, Lithuania

author

Ramunas Skaudzius

• Department of General and Inorganic Chemistry, Vilnius University, LT-03225, Vilnius, Lithuania

author

Rimantas Raudonis

• Department of General and Inorganic Chemistry, Vilnius University, LT-03225, Vilnius, Lithuania

author

Aivaras Kareiva

• Department of General and Inorganic Chemistry, Vilnius University, LT-03225, Vilnius, Lithuania

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Identifiers

DOI

10.2478/s11532-009-0025-z