Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1620634 | Journal of Alloys and Compounds | 2009 | 6 Pages |
Abstract
New pyrophosphate Sn0.9Sc0.1(P2O7)1âδ was prepared by an aqueous solution method. The structure and conductivity of Sn0.9Sc0.1(P2O7)1âδ have been investigated. XRD analysis indicates that Sn0.9Sc0.1(P2O7)1âδ exhibits a 3 Ã 3 Ã 3 super structure. It was found that Sn0.9Sc0.1(P2O7)1âδ prepared by an aqueous method is not conductive. The total conductivity of Sn0.9Sc0.1(P2O7)1âδ in open air is 2.35 Ã 10â6 and 2.82 Ã 10â9 S/cm at 900 and 400 °C respectively. In wet air, the total conductivity is about two orders of magnitude higher (8.1 Ã 10â7 S/cm at 400 °C) than in open air indicating some proton conduction. SnP2O7 and Sn0.92In0.08(P2O7)1âδ prepared by an acidic method were reported fairly conductive but prepared by similar solution methods are not conductive. Therefore, the conductivity of SnP2O7-based materials might be related to the synthetic history. The possible conduction mechanism of SnP2O7-based materials has been discussed in detail.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Rong Lan, Shanwen Tao,