Stabilization of the cubic phase in zirconia–scandia by niobium oxide addition

Zirconia–10mol% scandia (ScSZ) with additions of x mol% niobium oxide (x=0, 0.25, 0.5 and 1) nanoparticles were chemically synthesized. The introduction of niobium as a codopant is proposed for stabilization of the cubic phase of zirconia–scandia solid electrolyte. Several compositions were synthesi...

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Bibliographic Details
Published in:Materials letters 2014-11, Vol.134, p.27-29
Main Authors: Grosso, R.L., Muccillo, R., Muccillo, E.N.S.
Format: Article
Language:English
Subjects:
Electron microscopy
Nanoparticles
Phase transformation
Thermal properties
X-ray techniques
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Summary:Zirconia–10mol% scandia (ScSZ) with additions of x mol% niobium oxide (x=0, 0.25, 0.5 and 1) nanoparticles were chemically synthesized. The introduction of niobium as a codopant is proposed for stabilization of the cubic phase of zirconia–scandia solid electrolyte. Several compositions were synthesized by a solution method to ensure chemical homogeneity. The thermal analysis results reveal that the addition of niobium oxide reduced the crystallization temperature of zirconia. The morphology of the calcined powders consists of agglomerated nanoparticles with 6.5nm mean crystallite size. In situ high-temperature X-ray diffraction evidenced the full stabilization of the cubic phase of zirconia–10mol% scandia containing 0.5mol% niobium oxide content. •Niobia and scandia codoped zirconia were synthesized by a solution method.•Nanoparticles with mean crystallite size of 6.5nm were obtained.•The cubic phase of zirconia–scandia was fully stabilized at room temperature with addition of only 0.5mol% niobium oxide content.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2014.07.039