TY - JOUR
T1 - Structure and ionic conductivity of rapidly quenched AgI-Ag2WO4 superionic conductor glasses
AU - Hosono, Megumi
AU - Kawamura, Junichi
AU - Itoigawa, Hiroyuki
AU - Kuwata, Naoaki
AU - Kamiyama, Takashi
AU - Nakamura, Yoshio
N1 - Funding Information:
We gratefully thank Dr M. Ohkawa (Ehime University) and Dr M. Sakurai (Institute for Materials Research of Tohoku University) for XANES measurements, and Mr E. Yamada (Hokkaido University) for NMR measurements. We also thank Professors T. Minami and M. Tatsumisago (Osaka Prefecture University), Dr J. Kuwano (Science University of Tokyo), Professor T. Kudo (Tokyo University), for their helpful discussions. This work is partly supported by Grant-in Aid for Scientific Research on Priority Areas (No. 260) from the Ministry of Education, Science, Sports and Culture.
PY - 1999
Y1 - 1999
N2 - Silver ion conducting glasses composed of (AgI)x-(Ag2WO4)1-x (x = 0.80-0.55) were prepared by a rapid melt quenching method. Their physical properties were investigated by X-ray, DSC, impedance and Ag-109 NMR measurements. The glass transition temperatures were in the range from 110°C to 187°C. The glasses show unusually high ionic conductivities of 2.5 × 10-3 S/cm at x=0.55 and 2.3 × 10-1 S/cm at x=0.80, which varied exponentially with increasing AgI content. Ag-109 NMR spectra also support the high mobility of silver ions in the glasses. Structures of the glasses were investigated by FTIR and W-L1 edge XANES. From these results it is concluded that the tungsten ions are octahedrally coordinated by oxygen ions as in crystalline Ag2WC4 and Ag26I18W4O16, which is quite different from the structure of AgI-Ag2MoO4 glasses.
AB - Silver ion conducting glasses composed of (AgI)x-(Ag2WO4)1-x (x = 0.80-0.55) were prepared by a rapid melt quenching method. Their physical properties were investigated by X-ray, DSC, impedance and Ag-109 NMR measurements. The glass transition temperatures were in the range from 110°C to 187°C. The glasses show unusually high ionic conductivities of 2.5 × 10-3 S/cm at x=0.55 and 2.3 × 10-1 S/cm at x=0.80, which varied exponentially with increasing AgI content. Ag-109 NMR spectra also support the high mobility of silver ions in the glasses. Structures of the glasses were investigated by FTIR and W-L1 edge XANES. From these results it is concluded that the tungsten ions are octahedrally coordinated by oxygen ions as in crystalline Ag2WC4 and Ag26I18W4O16, which is quite different from the structure of AgI-Ag2MoO4 glasses.
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U2 - 10.1016/S0022-3093(98)00798-4
DO - 10.1016/S0022-3093(98)00798-4
M3 - Article
AN - SCOPUS:0033101116
SN - 0022-3093
VL - 244
SP - 81
EP - 88
JO - Journal of Non-Crystalline Solids
JF - Journal of Non-Crystalline Solids
IS - 1
ER -