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Performance of Nano-3YSZ toughened β"-Alumina solid electrolyte prepared by EDTA-Zr(IV)/Y(III) complex as surface modifier.
- Source :
-
Journal of Alloys & Compounds . Mar2020, Vol. 817, pN.PAG-N.PAG. 1p. - Publication Year :
- 2020
-
Abstract
- Due to its excellent ionic conductivity and electronic insulation, β/β″-alumina is widely used as a solid electrolyte in molten salt electrochemical cell and alkali metal thermoelectric convertor (AMTEC). In this article, nano-3mol% Yttrium partial stabilized zirconia (3YSZ) toughened β″-alumina solid electrolytes (BASEs) were fabricated by surface modification of β/β"-alumina precursor particles with ethylenediaminetetraacetic acid (EDTA) - Zirconium (IV)/Yttrium (III) complex. The performance of BASEs with 0-10 wt% amount of nano-3YSZ addition (Zr-BASE) was systematically investigated on their phase composition, density, microstructure, bending strength, and conductivity. It was found that nano-3YSZ grains were intergranular and uniformly distributed in BASE matrix even at as low as 3 wt% amount of addition, which resulted in higher density, more homogeneous microstructure, higher Weibull modulus, higher characteristic strength and increased grain boundary resistance of Zr-BASE than those of BASE without 3YSZ addition. Zr-BASE with 5 wt% amount of nano-3YSZ addition demonstrated good conductivity (0.071 S•cm−1 at 300 °C, 0.33 S cm−1 at 600 °C) and higher characteristic strength (283 MPa). The obtained results indicated that surface modification by EDTA-Zr(IV)/Y(III) complex advantaged in the preparation of better performance BASEs with a small amount of nano-3YSZ addition. Image 1 • EDTA complex surface modification was used to uniformly adding nano-3YSZ to BASE. • Zr-BASE was obtained with higher mechanical strength and medium ion conductivity. • BASE with 5 wt% 3YSZ addition showed better ion conductivity and mechanical strength. • EDTA complex was good at preparing better performance BASE with low 3YSZ addition. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09258388
- Volume :
- 817
- Database :
- Academic Search Index
- Journal :
- Journal of Alloys & Compounds
- Publication Type :
- Academic Journal
- Accession number :
- 141109084
- Full Text :
- https://doi.org/10.1016/j.jallcom.2019.152717