The influence of the sintering temperature on BaZr0·7Ce0·2Y0·1O3-δ proton conductors prepared by Spark Plasma Sintering
| Autor: | Sandrine Ricote, J. Wallis, K.-D. Weltmann, E. Burkel, Angela Kruth |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Diffraction Materials science Process Chemistry and Technology Analytical chemistry Sintering Spark plasma sintering 02 engineering and technology Conductivity 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Bond length visual_art 0103 physical sciences Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Ceramic Crystallite 0210 nano-technology |
| Zdroj: | Ceramics International. 47:15349-15356 |
| ISSN: | 0272-8842 |
| Popis: | BaZr0·7Ce0·2Y0·1O3-δ (BZCY72) proton-conducting ceramics were prepared by Spark Plasma Sintering. The effect of the sintering temperature (1150–1650°C) on the microstructural, crystallographic, and electrochemical properties of BZCY72 as well as long-term stability was investigated. From X-ray diffraction, rhombohedral BZCY72 was observed at all sintering temperatures. Specimen with the highest relative densities of around 99.5% were obtained at 1450°C, also exhibiting high stability in ambient laboratory air over a period of six months. Total conductivities of 1.01 · 10−3 S cm−1 were obtained at 600°C in moist 5%H2/Ar. With increasing temperature the samples were denser, exhibited larger crystallite and grain sizes and consequently higher GB conductivities. A small increase in bulk conductivity was discussed in terms of decrease of degree of octahedra tilting and increase of B–O bond lengths. |
| Databáze: | OpenAIRE |
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