Journal
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
Volume 76, Issue -, Pages 366-373Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2019.04.002
Keywords
Na plus -beta/beta ''-alumina; YSZ (Yttria-Stabilized Zirconia)-toughened alumina; Na-based batteries; Vapor-Phase synthesis
Funding
- Konkuk University
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Crystal phases of Na+-beta/beta ''-alumina electrolytes prepared by vapor-phase synthesis to resolve problems associated with solid-state reaction (i.e., Na2O loss at high sintering temperature and limitation to reducing the thickness) were analyzed. Na+-beta/beta ''-alumina/YSZ composite was prepared by alpha- to beta/beta ''-alumina phase conversion using sodium aluminate (i.e. Na2O source) from a alpha-alumina/YSZ sintered sample by vapor-phase synthesis. A fabricated Na+-beta/beta ''-alumina fully crystalized without any secondary phase. Its bulk density increased with increasing YSZ content. A maximum ionic conductivity of 1.8 x 10(-2) S/cm at 350 degrees C was obtained from a 50 wt.% YSZ-added specimen converted at 1500 degrees C for four hours. (C) 2019 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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