Hydroxyl defect effect on the resistance degradation behavior in Y-doped (Ba,Ca)(Ti,Zr)O 3 bulk ceramics
| Autor: | Chi Yuen Huang, Christian Pithan, C.Y. Su, Detlev F. Hennings, Rainer Waser, Yu Ju Kao |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Reducing atmosphere Electron energy loss spectroscopy Doping Analytical chemistry 02 engineering and technology Conductivity 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Dielectric spectroscopy Transmission electron microscopy 0103 physical sciences Materials Chemistry Ceramics and Composites Grain boundary 0210 nano-technology |
| Zdroj: | Journal of the European Ceramic Society. 36:3147-3155 |
| ISSN: | 0955-2219 |
| DOI: | 10.1016/j.jeurceramsoc.2016.04.041 |
| Popis: | Degradation behavior of acceptor (Y)-doped (Ba,Ca)(Ti,Zr)O3 ceramics sintered in moist reducing atmosphere and subsequently re-oxidized in dry or wet atmospheres was contrasted. The degradation behavior critically depends on the water vapor incorporation, the time to degradation systematically decreased with the incorporation of hydroxyl defects ( O H ) O • . The electrical conductivity was investigated by means of impedance spectroscopy (IS) to determine properties, such as grain and grain boundary conductivity, grain boundary potential barrier height, and space charge layer thickness. Furthermore, transmission electron microscopy (TEM) and electron energy loss spectroscopy (EELS) were applied to consider microstructure, microchemistry, and oxygen stoichiometry changes. |
| Databáze: | OpenAIRE |
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