Ag-108m tracer diffusion in HgI2-Ag2S-As2S3 glass system

作者：Boidin R; Alekseev I; Michel K; Le Coq D; Bychkov E^*

来源：Solid State Ionics, 2014, 262: 821-823.

DOI：10.1016/j.ssi.2013.10.030

• Chalcogenide glasses
• Ag tracer diffusion
• Wagner polarization
• Conductivity simulations

Mercury iodide additions to the Ag2S-As2S3 glass system increase the electrical conductivity even though the silver content decreases, in particular, for the (HgI2)(x)(Ag2S)(50) - (x/2)(As2S3)(50) (- x/2) series. Ag-108m tracer diffusion and Wagner dc polarization measurements confirm that the conductivity is ionic thus excluding a possible change from ionic to electronic conductivity with increasing x. Conductivity simulations have been carried out to verify whether an exchange reaction between silver sulfide and mercury iodide could explain the ion transport evolution. The results are only partly consistent with the experiment and suggest the appearance of extrinsic conduction pathways which need to be verified unambiguously.

• 出版日期2014-9-1