Improving the room temperature ionic conductivity of Al-Li7La3Zr2O12 ceramics by Ba and Y or Ba and W co-doping
| Autor: | Gao Min, Li-Ping Xiong, Jie Chen, Liu Yuze, Liu Xiaozhen |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Process Chemistry and Technology Doping Analytical chemistry 02 engineering and technology Crystal structure 021001 nanoscience & nanotechnology 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials visual_art Phase (matter) 0103 physical sciences Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Relative density Ionic conductivity Grain boundary Ceramic 0210 nano-technology Shrinkage |
| Zdroj: | Ceramics International. 45:13488-13495 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2019.04.052 |
| Popis: | Li6.5+xLa3-xBaxZr1.9Y0.1Al0.2O12 (0 ≤ x ≤ 0.05), Li6.42+yLa2.98Ba0.02Zr2-yYyAl0.2O12 (0 ≤ y ≤ 0.14) and Li6.42-2zLa2.98Ba0.02Zr2-zWzAl0.2O12 (0.05 ≤ z ≤ 0.45) ceramics were synthesized by the solid-state reaction method. The effects of the Ba, Y and W content on the crystallographic structure, morphology, the relative density and shrinkage, and the total ionic conductivity of the synthesized ceramics were studied, respectively. Li6.5+xLa3-xBaxZr1.9Y0.1Al0.2O12 (x = 0.01–0.05), Li6.42+yLa2.98Ba0.02Zr2-yYyAl0.2O12 (y = 0.06–0.12) and Li6.42-2zLa2.98Ba0.02Zr2-zWzAl0.2O12 (z = 0.05–0.45) ceramics were found to be of single cubic phase. Co-substitution of Ba and Y or of Ba and W for La and Zr can eliminate grain boundary, accelerate densification, and improve the ionic conductivity. The relative density and the total ionic conductivity at room temperature of Li6.52La2.98Ba0.02Zr1.9Y0.1Al0.2O12 and Li5.72La2.98Ba0.02Zr1.65W0.35Al0.2O12 ceramics are 93.23% and 2.02 × 10−4 S/cm, and 96.32% and 6.35 × 10−4 S/cm, respectively. |
| Databáze: | OpenAIRE |
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