Effect of precursors on β-alumina electrolyte preparation. Issue 7 (July 2015)

• Record Type: Journal Article
• Authors: Barison, S.; Fasolin, S.; Mortalò, C.; Boldrini, S.; Fabrizio, M.
• Is Part Of: Journal of the European Ceramic Society. Volume 35:Issue 7(2015:Jul.)
• Page Start: 2099
• Page End: 2107
• Publication Date: 2015-07
• Subjects: Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2015.01.006
• Languages: English
• ISSNs: 0955-2219

Abstract

<abstract abstract-type="author" id="abs0005"> <title id="sect0005">Abstract</title> <sec> <p id="spar0005">This work describes the synthesis of Mg²⁺- and Li⁺-stabilized β-alumina solid electrolytes (Na_1.67Mg_0.67Al_10.33O₁₇ and Na_1.67Li_0.33Al_10.67O₁₇ respectively) and investigates the influence of different Al₂O₃ precursors and stabilizers on their structural properties. The β-alumina precursors were α-Al₂O₃, γ-Al₂O₃, Pseudo-Boehmite (AlOOH·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 Ω⁻¹ cm⁻¹ at 300 °C for Li⁺-stabilized β-alumina.</p> </sec> </abstract>