Na2OxAl2O3 (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, lambda-Na2OxAl2O3, 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 lambda-Na2OxAl2O3 possess a large three-dimensional ionic conductivity at 400°C.
Sol-gel synthesis of lambda-Na2O·xAl2O3 films
MARTUCCI, ALESSANDRO;SARTORI, SABRINA;L. ARMELAO;GUGLIELMI, MASSIMO
2003
Abstract
Na2OxAl2O3 (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, lambda-Na2OxAl2O3, 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 lambda-Na2OxAl2O3 possess a large three-dimensional ionic conductivity at 400°C.File in questo prodotto:
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