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.
2003
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/143333
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