Synthesis and Na+ conduction properties of Nasicon-type glass-ceramics in the system Na2O-Y2O3-X2O3-SiO2 (X=B, Al, Ga) and effect of Si substitution
| Autor: | Naoya Yoshida, Kimihiro Yamashita, Toshinori Okura, Koji Kawada, Hideki Monma |
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| Rok vydání: | 2012 |
| Předmět: |
Materials science
Mineralogy chemistry.chemical_element Crystal growth General Chemistry Condensed Matter Physics law.invention Crystallography chemistry Aluminium law visual_art Phase (matter) visual_art.visual_art_medium Fast ion conductor General Materials Science Ceramic Crystallization Boron Earth (classical element) |
| Zdroj: | Solid State Ionics. 225:367-370 |
| ISSN: | 0167-2738 |
| Popis: | Glass-ceramics of the boron-, aluminium- or gallium-containing Na 5 RSi 4 O 12 -type (R = rare earth; Y) Na + -superionic conductors were prepared by crystallization of glasses with the composition Na 3 + 3 x + y Y 1− x X y Si 3− y O 9 (X = B; NaYBSi, X = Al; NaYAlSi, X = Ga; NaYGaSi) ( x = 0.2, y = 0.1). The crystallization kinetics of the glasses was examined by DTA, and the effects of X elements on the separation of the phase and the microstructural effects on the conduction properties of glass-ceramics were discussed. The activation energies of crystal growth of the NaYBSi, NaYAlSi and NaYGaSi glasses with the Na 3.7 Y 0.8 B 0.1 Si 2.9 O 9 , Na 3.7 Y 0.8 Al 0.1 Si 2.9 O 9 and Na 3.7 Y 0.8 Ga 0.1 Si 2.9 O 9 compositions were 410, 392 and 382 kJ/mol, respectively. The conductivities of the glass-ceramic NaYBSi, NaYAlSi and NaYGaSi were 4.32 × 10 − 2 , 3.73 × 10 − 2 and 3.40 × 10 − 2 S/cm at 300 °C, respectively. |
| Databáze: | OpenAIRE |
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