Influence of additives on phase stabilization of scandia-doped zirconia

被引：0
|
作者：
dos Santos Muccillo, Eliana Navarro [1 ]
Grosso, Robson Lopes [1 ]
dos Reis, Shirley Leite [1 ]
Muccillo, Reginaldo [1 ]
机构：
[1] Energy & Nucl Res Inst IPEN, POB 11049, BR-05422970 Sao Paulo, SP, Brazil
来源：
MATERIA-RIO DE JANEIRO | 2017年 / 22卷 / 02期
基金：
巴西圣保罗研究基金会;
关键词：
scandia-doped zirconia; phase stabilizer; sintering aid; ionic conductivity; ELECTRICAL-CONDUCTIVITY; ELECTROLYTE;
D O I：
10.1590/S1517-707620170002.0154
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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 beta-rhombohedric phase. Specimens with calcium as additive show total conductivity of 23.8 mS. cm(-1) at 750 degrees C with activation energy of 1.13 eV. Liquid phase sintering by boron oxide addition is effective to enhance the densification of the solid electrolyte.
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页数：7
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