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(Referência obtida automaticamente do SciELO, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Influence of additives on phase stabilization of scandia-doped zirconia

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Autor(es):
Eliana Navarro dos Santos Muccillo [1] ; Robson Lopes Grosso [2] ; Shirley Leite dos Reis [3] ; Reginaldo Muccillo [4]
Número total de Autores: 4
Afiliação do(s) autor(es):
[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
Número total de Afiliações: 4
Tipo de documento: Artigo Científico
Fonte: MATERIA-RIO DE JANEIRO; v. 22, n. 2 2017.
Citações Web of Science: 0
Resumo

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)

Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
Beneficiário:Elson Longo da Silva
Linha de fomento: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
Processo FAPESP: 12/03319-5 - Preparação e caracterização da zircônia-escândia contendo aditivos
Beneficiário:Robson Lopes Grosso
Linha de fomento: Bolsas no Brasil - Doutorado