Effect of BaO B2O3 composite sintering aid on sinterability and electrical property of BaZr0.85Y0.15O3- ceramic
| Autor: | Lucun Guo, Jiahui Jiao, Qiang Li, Han Chen, Yali Luo, Yiheng Gu, Yifeng Zheng, Lin Ge |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Scanning electron microscope Process Chemistry and Technology Composite number Sintering 02 engineering and technology Conductivity 021001 nanoscience & nanotechnology 01 natural sciences Evaporation (deposition) Surfaces Coatings and Films Electronic Optical and Magnetic Materials Dielectric spectroscopy visual_art 0103 physical sciences Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Grain boundary Ceramic Composite material 0210 nano-technology |
| Zdroj: | Ceramics International. 45:13679-13684 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2019.04.062 |
| Popis: | Yttrium-doped barium zirconate (BZY) has been extensively studied as a promising electrolyte material for protonic ceramic fuel cells. However, inferior sinterability is a major barrier in BZY development. In our research, the effect of BaO B2O3 composite sintering aid on the sintering behavior and electrical property of BaZr0.85Y0.15O3-δ (BZY15) are examined. BaO B2O3 addition reduces the sintering temperature of BZY15 by approximately 200 °C via the liquid-phase sintering mechanism. The corresponding bulk and grain boundary conductivities are prominently improved ( B2O3 addition), whereas the further addition of sintering aid decreases the grain boundary conductivity. Notably, the scanning electron microscope (SEM) and electrochemical impedance spectroscopy (EIS) analyses suggest that the enhanced conductivity may be related to the temperature dependence of Ba evaporation. |
| Databáze: | OpenAIRE |
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