Published February 4, 2009
| Version v1
Journal article
Reducibility study of oxide-ion conductors La2-xBaxMo2-yAyO9-δ (A = W, Al, Ga) assessed by impedance spectroscopy
- 1. Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031 (China)
- 2. Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315040 (China)
Description
The reducibility of oxide-ion conductors La2-xBaxMo2-yWyO9-δ (x = 0, 0.06; y = 0, 0.1, 0.5, 1.0) and La2Mo1.9A0.1O9-δ (A = Al, Ga) were studied in the reducing atmosphere of 5%H2 + Ar by means of impedance spectroscopy measurement. The introduction of Ba at La site in La2Mo2-yWyO9 can lower the sintering temperature by about 100 K in comparison with the La2Mo2-yWyO9 samples. All substitutions can enhance the conductivity and improve the reducibility in the temperature range from 548 to 923 K. The double substitution of Ba and W as well as substitution of Al or Ga at Mo sites has a better stabilizing effect than the single tungsten substitution. Among these substitutions the introduction of Al has the best stabilizing effect
Availability note (English)
Available from http://dx.doi.org/10.1016/j.materresbull.2008.04.015Additional details
Identifiers
- DOI
- 10.1016/j.materresbull.2008.04.015;
- PII
- S0025-5408(08)00149-9;
Publishing Information
- Journal Title
- Materials Research Bulletin
- Journal Volume
- 44
- Journal Issue
- 2
- Journal Page Range
- p. 446-450
- ISSN
- 0025-5408
- CODEN
- MRBUAC
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 40069718
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- ALUMINIUM COMPOUNDS; BARIUM COMPOUNDS; GALLIUM COMPOUNDS; HYDROGEN; IMPEDANCE; IONIC CONDUCTIVITY; LANTHANUM COMPOUNDS; OXIDES; SINTERING; SPECTROSCOPY; TEMPERATURE RANGE 0400-1000 K; TUNGSTEN COMPOUNDS
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; ELEMENTS; FABRICATION; NONMETALS; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; REFRACTORY METAL COMPOUNDS; TEMPERATURE RANGE; TRANSITION ELEMENT COMPOUNDS
Optional Information
- Copyright
- Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.