Analysis of crystal phases of Na+-β/β'-alumina/YSZ composite prepared by vapor-phase synthesis from YSZ-toughened α-alumina
| Autor: | Young-Hyuk Kim, Sang-Soo Han, Sung-Ki Lim, Dae-Han Lee |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Sodium aluminate General Chemical Engineering Composite number Vapor phase Analytical chemistry Sintering 02 engineering and technology Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Crystal chemistry.chemical_compound chemistry Ionic conductivity 0210 nano-technology Yttria-stabilized zirconia |
| Zdroj: | Journal of Industrial and Engineering Chemistry. 76:366-373 |
| ISSN: | 1226-086X |
| Popis: | Crystal phases of Na+-β/β"-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+-β/β"-alumina/YSZ composite was prepared by α- to β/β"-alumina phase conversion using sodium aluminate (i.e. Na2O source) from a α-alumina/YSZ sintered sample by vapor-phase synthesis. A fabricated Na+-β/β"-alumina fully crystalized without any secondary phase. Its bulk density increased with increasing YSZ content. A maximum ionic conductivity of 1.8 × 10−2 S/cm at 350 °C was obtained from a 50 wt.% YSZ-added specimen converted at 1500 °C for four hours. |
| Databáze: | OpenAIRE |
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