Influence of additives on phase stabilization of scandia-doped zirconia
| Autor: | Muccillo,Eliana Navarro dos Santos, Grosso,Robson Lopes, Reis,Shirley Leite dos, Muccillo,Reginaldo |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
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| Zdroj: | Matéria (Rio de Janeiro), Volume: 22, Issue: 2, Article number: e11822, Published: 01 JUN 2017 Matéria (Rio de Janeiro) v.22 n.2 2017 Matéria (Rio de Janeiro. Online) instacron:RLAM |
| Popis: | The effects of small additions of tin, zinc, calcium and boron oxides on phase composition and electrical conductivity of zirconia-10 mol% scandia were investigated. Compounds containing 1 mol% zinc, tin and calcium oxides and 1, 3 and 5 wt.% boron oxide were prepared by solid state reaction and characterized by X-ray diffraction, density measurements, scanning electron microscopy and impedance spectroscopy. Full stabilization of the cubic structure at room temperature was obtained with additions of 1 mol% calcium oxide and 2 wt.% boron oxide. Partially stabilized compounds exhibit herringbone structure, characteristic of the β-rhombohedric phase. Specimens with calcium as additive show total conductivity of 23.8 mS.cm-1 at 750ºC with activation energy of 1.13 eV. Liquid phase sintering by boron oxide addition is effective to enhance the densification of the solid electrolyte. |
| Databáze: | OpenAIRE |
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