Raman spectroscopy of SrZrO3 based proton conducting electrolyte: Effect of Y-doping and Sr-nonstoichiometry |
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| Authors: | S.N. Shkerin A.V. Rudakova K.M. Bulanin A. Sh Khaliullina A.N. Meshcherskikh E.G. Vovkotrub L.A. Dunyushkina |
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| Affiliation: | 1. Institute of High Temperature Electrochemistry, Ekaterinburg, Russia;2. Laboratory “Photoactive Nanocomposite Materials”, Saint-Petersburg State University, Saint-Petersburg, Russia;3. Department of Photonics, Saint-Petersburg State University, Saint-Petersburg, Russia;4. Institute of Quantum Physics, Irkutsk National Research Technical University, Irkutsk, Russia;5. Ural Federal University, Ekaterinburg, Russia |
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| Abstract: | The present research describes the results of Raman spectroscopic study of undoped and Y-doped SrZrO3 having a great potential for application in proton-conducting fuel cells. Effects of yttrium doping and strontium nonstoichiometry on the local environment of cations and vibrational properties of strontium zirconate were investigated. Ceramic samples SryZr1-xYxO3-δ (x = 0, 0.02, 0.05; y = 0.94, 0.98, 1.00) were synthesized via a chemical solution method and sintered at 1650 °C. Microstructure, phase and chemical composition of the samples were characterized by Scanning Electron Microscopy (SEM), X-ray diffraction (XRD) and Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). Analysis of Raman spectra peculiarities upon changes in Sr- and Y- concentrations has shown that yttrium ions can be partitioned over both A- and B-sites in the strontium-deficient zirconates with the dopant concentrations more than 2 at%. |
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| Keywords: | Sr-deficiency Raman spectroscopy Proton conducting electrolyte |
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