THE ORIGINS OF NEUTRON-SCATTERING PREPEAKS AND CONDUCTIVITY ENHANCEMENT IN AGI-CONTAINING GLASSES

被引:77
作者
ROUSSELOT, C
MALUGANI, JP
MERCIER, R
TACHEZ, M
CHIEUX, P
PAPPIN, AJ
INGRAM, MD
机构
[1] INST LAUE LANGEVIN,GRENOBLE,FRANCE
[2] UNIV ABERDEEN,DEPT CHEM,ABERDEEN AB9 2UE,SCOTLAND
关键词
CONDUCTIVITY ENHANCEMENT; DIFFRACTION PREPEAKS; DYNAMIC STRUCTURE MODEL; GLASS;
D O I
10.1016/0167-2738(95)00103-D
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Addition of AgI causes remarkable increases in the Ag+-ion conductivity of glass, and in some cases to the appearance of prepeaks in neutron scattering data (at Q = ca. 0.8 Angstrom(-1)). The origins of these prepeaks are discussed in relation to possible structural models. It is suggested that the enhanced conductivity is related to the formation of AgI clusters, but that local structure in the glass especially at the edge of these clusters is continuously modified by the mobile Ag+ ions. According to the dynamic structure model, the mechanism of cation transport in AgI-based glasses therefore resembles that in other cation-conducting glasses.
引用
收藏
页码:211 / 221
页数:11
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