Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 35, Issue 7, Pages 2099-2107Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2015.01.006
Keywords
Beta-alumina; Alumina precursors; Density; Conductivity; Rietveld
Categories
Funding
- National Research Council of Italy - Italian Ministry of Economic Development Agreement Ricerca di sistema elettrico nazionale
Ask authors/readers for more resources
This work describes the synthesis of Mg2+- and Li+-stabilized beta-alumina solid electrolytes (Na1.67Mg0.67Al10.33O17 and Na1.67Li0.33Al10.67O17 respectively) and investigates the influence of different Al2O3 precursors and stabilizers on their structural properties. The beta-alumina precursors were alpha-Al2O3, gamma-Al2O3, Pseudo-Boehmite (AlOOH center dot H2O) and Bayerite (Al(OH)(3)), with Na2CO3 as sodium source and MgCO3 or LiCO3 as phase stabilizers. The effect of composition and processing on phase purity and microstructure of sintered specimens was inspected by X-ray diffraction, simultaneous thermal gravimetry - differential scanning calorimetry coupled with residual gas analysis and scanning electron microscopy. Linear shrinkage evaluation was carried out by dilatometry. Furthermore, the influence of composition, structure and density on electrical properties was also investigated finding conductivity values up to 0.14 Omega(-1) cm(-1) at 300 degrees C for Li+-stabilized beta-alumina. (C) 2015 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available