Low temperature conductivity and ion dynamics in silver iodide–silver metaphosphate glasses

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发布日期 2017-07-18
DOI 10.1039/C7CP03695G
影响因子 3.676
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摘要

Silver iodide–silver metaphosphate glasses xAgI·(1 − x)AgPO3 (x = 0.3, 0.4, and 0.5) have been prepared using the usual melt quenching method. Differential scanning calorimetry has been used to determine the glass transition temperature of the samples. Impedance spectroscopy spanning wide temperature (20 K to 200 K) and frequency (10−1 Hz to 106 Hz) ranges has been employed to investigate the ion dynamics. At high temperatures, below the glass transition temperature and down to around 120 K, the dynamics show the usual behavior of dc and dispersed conductivity due to the random and correlated motion of the ions. The dc conductivity of the glasses varies dramatically and it increases with the AgI content as expected. At the lowest temperatures investigated, however, the conductivity of the glasses was indistinguishable. Hence, the low temperature dynamics are identical irrespective of the amount of AgI and the structure of the glass. In addition, a nearly constant loss behavior, independent of the temperature and composition, was attained at the lowest temperatures.

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来源期刊

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
自引率: 10.3%
年发文量: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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