Preparation and characterization of scandia-stabilized zirconia containing additives
| Full text | |
| Author(s): |
Eliana Navarro dos Santos Muccillo
;
Robson Lopes Grosso
;
Shirley Leite dos Reis
;
Reginaldo Muccillo
Total Authors: 4
|
| Document type: | Journal article |
| Source: | MATERIA-RIO DE JANEIRO; v. 22, n. 2 2017. |
| Web of Science Citations: | 0 |
| Abstract | |
ABSTRACT 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. (AU) | |
| FAPESP's process: | 13/07296-2 - CDMF - Center for the Development of Functional Materials |
| Grantee: | Elson Longo da Silva |
| Support type: | Research Grants - Research, Innovation and Dissemination Centers - RIDC |
| FAPESP's process: | 12/03319-5 - Preparation and characterization of scandia-stabilized zirconia containing additives |
| Grantee: | Robson Lopes Grosso |
| Support type: | Scholarships in Brazil - Doctorate |