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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Influence of additives on phase stabilization of scandia-doped zirconia

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Eliana Navarro dos Santos Muccillo [1] ; Robson Lopes Grosso [2] ; Shirley Leite dos Reis [3] ; Reginaldo Muccillo [4]
Total Authors: 4
[1] Energy and Nuclear Research Institute - Brasil
[2] Energy and Nuclear Research Institute - Brasil
[3] Energy and Nuclear Research Institute - Brasil
[4] Energy and Nuclear Research Institute - Brasil
Total Affiliations: 4
Document type: Journal article
Source: MATERIA-RIO DE JANEIRO; v. 22, n. 2 2017.
Web of Science Citations: 0

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 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: 12/03319-5 - Preparation and characterization of scandia-stabilized zirconia containing additives
Grantee:Robson Lopes Grosso
Support type: Scholarships in Brazil - Doctorate
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