INFLUENCE OF YTTRIA DOPANT ON THE STRUCTURE AND PROPERTIES of (ZrO₂)0,91−x(Sc₂O₃)0,09(Y₂O₃)х (x = 0÷0,02) crystals
| Autor: | Elena E. Lomonova, F. O. Milovich, Vladimir T. Bublik, D.A. Agarkov, S. I. Bredihin, S. V. Seryakov, Alexey V. Kulebyakin, L. D. Iskhakova, M. A. Borik, N. Yu. Tabachkova, I. E. Kuritsyna, V. А. Myzina |
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| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Izvestiya Vysshikh Uchebnykh Zavedenii. Materialy Elektronnoi Tekhniki = Materials of Electronics Engineering. 18:246-254 |
| ISSN: | 2413-6387 1609-3577 |
| DOI: | 10.17073/1609-3577-2015-4-246-254 |
| Popis: | We have studied the influence of the yttrium oxide (Y2O3) dopant (1 and 2 mol %) on the phase composition, structure, and electrical properties of ZrO2–9 mol % Sc2O3 solid solution. Stabilization of ZrO2 jointly with 9 mol % Sc2O3 and 2 mol % Y2O3 is shown to allow the acquisition of high phase stability transparent homogeneous crystals with a cubic structure. Their mechanical grinding is established to cause no change in the phase composition of these crystals, whereas the powders retain the initial fluorine structure. The powders preserved the original structure of the fluorite crystals. All the probed crystals reveal high microhardness and low fracture toughness. Increasing the Y2O3 concentration in the crystals led to a reduction of the maximum loads on the indenter, which the sample withstood without cracking. As is shown, the specific conductivity exhibits nonmonotonic behavior depending on the Y2O3 concentration in the crystals. Increasing the Y2O3 content to 2 mol % in the solid electrolyte reduces the conductivity of the crystals in the entire temperature range that is attributed to a decrease in the carrier mobility due to the increasing ion radius of the stabilizing ion. |
| Databáze: | OpenAIRE |
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