Low-temperature ionic conductivity in AgI: AgPO3 glasses

被引:11
|
作者
Tomasi, Corrado [1 ]
Mustarell, Piercarlo [2 ]
Garcia, Maria Pilar Infante [2 ]
Magistris, Aldo [2 ]
Mandanici, Andrea [3 ]
机构
[1] Centro di Studio per la Termodinamica e l'Electrochimica dei Sistemi Sateni Fusi e Solidi, Consiglio Nazionale delle Ricerche, Via Taramelli 16, 27100 Pavia, Italy
[2] Department of Physical Chemistry 'M. Rolla', Istituto Nazionale per la Fisica della Materia, University of Pavia, Via Taramelli 16, 27100 Pavia, Italy
[3] Department of Physics, Istituto Nazionale per la Fisica della Materia, University of Messina, Ctr. Sperone, 98100 Messina, Italy
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D O I
10.1080/13642810110085433
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摘要
AgI: AgPO3 glasses are an interesting model system in which to address the relationships between carrier density and mobility, transport mechanism and medium-range order in fast ion-conducting glasses. In this paper we discuss an anomaly observed in the dc conductivity behaviour below room temperature. This anomaly is related to the opening of percolative channels for AgI contents higher than 30 mol%. Solid-state 109Ag nuclear magnetic resonance (NMR) measurements on the 1:1 AgI: AgPO3 glass allow us to determine the change in the number of mobile carriers over all the temperature region where the anomaly is observed. © 2002 Taylor & Francis Ltd.
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页码:475 / 483
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