TY - JOUR
T1 - Ionic conductivity and glass transition in superionic conducting glasses (Agi)1 - x(Ag2MoO4)x (x = 0.25, 0.3, 0.35). II. Structural relaxation and excess-free-volume theory
AU - Kawamura, J.
AU - Shimoji, M.
N1 - Funding Information:
The authors thank the Computer Center of Hokkaido University for the use of the HITAC M-200H computer. The authors are grateful to Professor Dr. T. Ishii in Okayama University. and Dr. T. Itami in our laboratory for their helpful discussions. This research was partly supported by a Scientific Research Grant from the Ministry of Education of Japan. The authors also thank the referee who informed us of the Kapustinski equation to estimate the radius of complex ions.
PY - 1986/12
Y1 - 1986/12
N2 - A theory of the structural relaxation and its effect on the ionic conductivity in superionic conducting glasses is presented by extending the excess-free-volume theory for normal glasses. The dependence of the ionic conductivity on time, temperature and cooling-heating rate is discussed for the Agl-Ag2MoO4 system which forms superionic conducting glasses. The present approach is applicable to a quantitative interpretation of the bifurcation of the observed conductivity from the Vogel-Tumman-Fulcher (VTF) law to the Arrhenius type at the glass transition temperature as well as other anomalous behaviours observed in the glass transition region (deviations from the Arrhenius law, annealing and hysteresis effects, etc.). The numerical results indicate that the activation volume of a silver cation should be much smaller than the average volume per ion; this appears to be of central importance in accounting for the superionic conducting process in such silver-ion-containing glasses.
AB - A theory of the structural relaxation and its effect on the ionic conductivity in superionic conducting glasses is presented by extending the excess-free-volume theory for normal glasses. The dependence of the ionic conductivity on time, temperature and cooling-heating rate is discussed for the Agl-Ag2MoO4 system which forms superionic conducting glasses. The present approach is applicable to a quantitative interpretation of the bifurcation of the observed conductivity from the Vogel-Tumman-Fulcher (VTF) law to the Arrhenius type at the glass transition temperature as well as other anomalous behaviours observed in the glass transition region (deviations from the Arrhenius law, annealing and hysteresis effects, etc.). The numerical results indicate that the activation volume of a silver cation should be much smaller than the average volume per ion; this appears to be of central importance in accounting for the superionic conducting process in such silver-ion-containing glasses.
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U2 - 10.1016/S0022-3093(86)80032-1
DO - 10.1016/S0022-3093(86)80032-1
M3 - Article
AN - SCOPUS:0022915674
VL - 88
SP - 295
EP - 310
JO - Journal of Non-Crystalline Solids
JF - Journal of Non-Crystalline Solids
SN - 0022-3093
IS - 2-3
ER -