Conductivity of a new pyrophosphate Sn0.9Sc0.1(P2O7)1-δ prepared by an aqueous solution method

Rong Lan; Shanwen Tao

doi:10.1016/j.jallcom.2009.06.203

Conductivity of a new pyrophosphate Sn_0.9Sc_0.1(P₂O₇)_1-δ prepared by an aqueous solution method

Rong Lan, Shanwen Tao

School of Engineering & Physical Sciences

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

Abstract

New pyrophosphate Sn_0.9Sc_0.1(P₂O₇)_1-d was prepared by an aqueous solution method. The structure and conductivity of Sn_0.9Sc_0.1(P₂O₇)_1-d have been investigated. XRD analysis indicates that Sn_0.9Sc_0.1(P₂O₇)_1-d exhibits a 3 × 3 × 3 super structure. It was found that Sn_0.9Sc_0.1(P₂O₇)_1-d prepared by an aqueous method is not conductive. The total conductivity of Sn_0.9Sc_0.1(P₂O₇)_1-d in open air is 2.35 × 10^-6 and 2.82 × 10^-9 S/cm at 900 and 400 °C respectively. In wet air, the total conductivity is about two orders of magnitude higher (8.1 × 10^-7 S/cm at 400 °C) than in open air indicating some proton conduction. SnP₂O₇ and Sn_0.92In_0.08(P₂O₇)_1-d 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. © 2009 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	380-385
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	486
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jallcom.2009.06.203
Publication status	Published - 3 Nov 2009

Keywords

Conductivity
Pyrophosphate
Sn 0.9 Sc 0.1 (P 2 O 7 ) 1-δ
Structure

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10.1016/j.jallcom.2009.06.203

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title = "Conductivity of a new pyrophosphate Sn0.9Sc0.1(P2O7)1-δ prepared by an aqueous solution method",

abstract = "New pyrophosphate Sn0.9Sc0.1(P2O7)1-d was prepared by an aqueous solution method. The structure and conductivity of Sn0.9Sc0.1(P2O7)1-d have been investigated. XRD analysis indicates that Sn0.9Sc0.1(P2O7)1-d exhibits a 3 × 3 × 3 super structure. It was found that Sn0.9Sc0.1(P2O7)1-d prepared by an aqueous method is not conductive. The total conductivity of Sn0.9Sc0.1(P2O7)1-d in open air is 2.35 × 10-6 and 2.82 × 10-9 S/cm at 900 and 400 °C respectively. In wet air, the total conductivity is about two orders of magnitude higher (8.1 × 10-7 S/cm at 400 °C) than in open air indicating some proton conduction. SnP2O7 and Sn0.92In0.08(P2O7)1-d 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. {\textcopyright} 2009 Elsevier B.V. All rights reserved.",

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AU - Lan, Rong

AU - Tao, Shanwen

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N2 - New pyrophosphate Sn0.9Sc0.1(P2O7)1-d was prepared by an aqueous solution method. The structure and conductivity of Sn0.9Sc0.1(P2O7)1-d have been investigated. XRD analysis indicates that Sn0.9Sc0.1(P2O7)1-d exhibits a 3 × 3 × 3 super structure. It was found that Sn0.9Sc0.1(P2O7)1-d prepared by an aqueous method is not conductive. The total conductivity of Sn0.9Sc0.1(P2O7)1-d in open air is 2.35 × 10-6 and 2.82 × 10-9 S/cm at 900 and 400 °C respectively. In wet air, the total conductivity is about two orders of magnitude higher (8.1 × 10-7 S/cm at 400 °C) than in open air indicating some proton conduction. SnP2O7 and Sn0.92In0.08(P2O7)1-d 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. © 2009 Elsevier B.V. All rights reserved.

AB - New pyrophosphate Sn0.9Sc0.1(P2O7)1-d was prepared by an aqueous solution method. The structure and conductivity of Sn0.9Sc0.1(P2O7)1-d have been investigated. XRD analysis indicates that Sn0.9Sc0.1(P2O7)1-d exhibits a 3 × 3 × 3 super structure. It was found that Sn0.9Sc0.1(P2O7)1-d prepared by an aqueous method is not conductive. The total conductivity of Sn0.9Sc0.1(P2O7)1-d in open air is 2.35 × 10-6 and 2.82 × 10-9 S/cm at 900 and 400 °C respectively. In wet air, the total conductivity is about two orders of magnitude higher (8.1 × 10-7 S/cm at 400 °C) than in open air indicating some proton conduction. SnP2O7 and Sn0.92In0.08(P2O7)1-d 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. © 2009 Elsevier B.V. All rights reserved.

KW - Conductivity

KW - Pyrophosphate

KW - Sn 0.9 Sc 0.1 (P 2 O 7 ) 1-δ

KW - Structure

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Conductivity of a new pyrophosphate Sn_0.9Sc_0.1(P₂O₇)_1-δ prepared by an aqueous solution method

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