INVESTIGADORES
MOGNI Liliana Veronica
artículos
Título:
On the thermodynamic stability of La2Mo2O9-d oxide-ion conductor
Autor/es:
J.VEGA-CASTILLO; L. MOGNI; G. CORBEL; PH. LACORRE; A. CANEIRO
Revista:
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Año: 2010 vol. 35 p. 5890 - 5894
ISSN:
0360-3199
Resumen:
The stability of La2Mo2O9-d oxide-ion conductor was studied under ArH2 and controlledoxygen partial pressure ( pO2) atmospheres within the range 608 < T < 1000 ºC, by thermogravimetry (TG), X-ray Diffraction (XRD), Temperature Controlled X-ray Diffraction(TCXRD) and Scanning Electron Microscopy (SEM). At 608 ºC under ArH2 flowing atmosphere, La2Mo2O9 phase was found to be unstable and reduction leads to an amorphous phase with composition close to La2Mo2O6.88. The stability of this amorphous phase under ArH2 was analyzed by TCXRD and found to be stable below 900 ºC. Isothermal TG under controlled pO2 at 1000 ºC indicated that La2Mo2O9-d is not stable below 10-7 Pa and decomposition took place without the formation of La7Mo7O30 or amorphization.
