Ionic Conductivity of 4%mol, 9.5%mol Yttria doped Zirconia Nanomaterials and (YSZ )0.98-(Al2O3)0.02 Nanocomposites

adel madani 2Amel c. Amdouni 2Abdelmonaem Touati 2Mongi Labidi 2Hedi Boussetta 2Claude J. Monty 1

1. CNRS- IMP , BP5 Odeillo, 66125-cedex, Font Romeu , France (IMP-CNRS), BP5 Odeillo, Font-Romeu 66125, France
2. faculté des sciences de Bizerte -Département de Physique -Zarzouna 7021 Tunisie (FSB), Zrazouna 7021, Tunisia

Abstract

Ionic conductivity of nanophases of 4% and 9.5 yttria doped zirconia YSZ were studied using impedance spectroscopy technique. In this study our aim is to find optimal conditions for any improvement of ionic conductivity at low temperature. Experimental results show that ionic conductivity of nanosized YSZ with 4% mol is higher than for single crystal YSZ with 9.5% mol and this for the most part of temperature domain studied (300-500C). For nanocomposite with 2 % mol Al2O3, we found that an light increase of ionic conductivity even at low temperatures. This work has shown that conductivity in these materials depends not only on concentration in alumina but also of microstructure. Comparing with N9, the nanocomposite NC2 with 2 % mol Al2O3 gives the highest conductivity in grain and not in grain boundary.

 

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Presentation: poster at E-MRS Fall Meeting 2004, Symposium A, by adel madani
See On-line Journal of E-MRS Fall Meeting 2004

Submitted: 2004-05-19 18:03
Revised:   2009-06-08 12:55