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2009 | 7 | 3 | 362-368
Tytuł artykułu

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

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
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. [...]
Wydawca

Czasopismo
Rocznik
Tom
7
Numer
3
Strony
362-368
Opis fizyczny
Daty
wydano
2009-09-01
online
2009-06-21
Twórcy
  • Department of General and Inorganic Chemistry, Vilnius University, LT-03225, Vilnius, Lithuania
  • Department of General and Inorganic Chemistry, Vilnius University, LT-03225, Vilnius, Lithuania
  • Department of General and Inorganic Chemistry, Vilnius University, LT-03225, Vilnius, Lithuania
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_s11532-009-0025-z
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