Article ID Journal Published Year Pages File Type
9761594 Solid State Ionics 2005 5 Pages PDF
Abstract
The effect of crystallization processes in the xAgI·0.75(100 − x)Ag2O·0.25(100 − x)P2O5, 50 ≤ x ≤ 75, glasses on the ionic conductivity was investigated, using impedance spectroscopy, X-ray diffractometry (XRD) and differential scanning calorimetry (DSC). The crystallization was induced and promoted by thermal processing. It was found out that depending on annealing conditions, the conductivity could be enhanced or lowered. The conductivity enhancement is observed when the glass is annealed near the glass transition temperature Tg for relatively short time. In this case, the XRD patterns do no indicate the presence of crystalline phases. The decrease of conductivity is observed for more pronounced crystallization, detectable by X-ray diffraction. The annealing does not affect the activation energy of ionic conductivity.
Related Topics
Physical Sciences and Engineering Chemistry Electrochemistry
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