Sol–Gel Synthesis of λ–Na2O·xAl2O3 Films |
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| Authors: | Alessandro Martucci Sabrina Sartori Alessandro Muffato Lidia Armelao Elisabetta Di Bartolomeo Enrico Traversa Massimo Guglielmi |
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| Affiliation: | Dipartimento di Ingegneria Meccania S. Materiali, Universita´di Padova.;Dipartimento di Chimica Inorganica, Metallorganica ed Analitica, Universitàdi Padova.;Universitàdi Roma Tor Vergata. |
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| Abstract: | Na2O· x Al2O3 ( x = 9, 11)films have been obtained by sol–gel method. Crystallization processes during heat treatments have been investigated by X–ray diffraction analysis. A metastable phase with the mullite structure, λ–Na2O· x Al2O3, has been observed starting from 800°C. Films remained stable after a heat treatment at 1000°C for 250 h. Impedance spectroscopy measurements showed that the films of λ-Na2O· x Al2O3 possess a large three–dimensional ionic conductivity at 400°C. |
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| Keywords: | sol-gel thin films alumina |
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