Ionic conductivity of small-grain polycrystals of silver iodide

被引：41
|
作者：
Ida, T [1 ]
Kimura, K [1 ]
机构：
[1] Himeji Inst Technol, Fac Sci, Kamigori, Hyogo 6781297, Japan
来源：
SOLID STATE IONICS | 1998年 / 107卷 / 3-4期
关键词：
ionic conductivity; silver iodide; fine particles;
D O I：
10.1016/S0167-2738(98)00002-2
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：
Small particles of AgI with various average size (140-680 nm) have been prepared by a gas-evaporation method. The powder X-ray diffraction patterns show that they are mixture of gamma- and beta-phases, and the mass fraction of the latter is roughly estimated at 20-25%. The room temperature conductivity of a polycrystalline pellet of small AgI particles shows enhancement by decreasing particle size, and the conductivity of 1.4 x 10(-4) Omega(-1) cm(-1) has been observed in 140 nm-grain AgI polycrystal. The overall activation energy for conduction varies from 0.38 to 0.28 eV, depending on the average size of the particles. (C) 1998 Elsevier Science B.V. All rights reserved.
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页码：313 / 318
页数：6
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