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Synthesis and properties of Hg0.7Pb0.3(BaSr)2Ca2Cu3Oz superconductors |
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| Authors: | Sergey Lee Maxim Kuznetsov Nikolai Kiryakov Denis Emelyanov and Yuri Tretyakov |
| Institution: | a Department of Chemistry, Moscow State University, B-234, 119899, Moscow, Russia b Institute of General and Inorganic Chemistry, 117905, Moscow, Russia |
| Abstract: | We have synthesized Hg(Pb)-1223 with substitutions of Sr for Ba, i.e. Hg0.7Pb0.3Ba2−xSrxCa2Cu3Oz (x = 0.0–2.0) by the ampoule method. The spray-drying method and thermal decomposition under vacuum were applied for the preparation of homogeneous precursors. Samples with Tc = 110–128 K were obtained without oxygen annealing. We found that substitution of Ba by Sr remarkably relaxed the requirements on the precursors preparation and allowed their handling under ambient conditions. |
| Keywords: | Hg-based superconductors Hg-1223 phase Substitutions Ampoule synthesis Spray-drying |
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