Electrical conductivity of AgI-CdI2-KI and AgI-CuI-KI ionic conducting systems

被引：4
作者：
Hassan, Mohammed [1 ]
Al-hakimi, Ahmed Noman [1 ]
Rafiuddin [2 ]
机构：
[1] Ibb Univ, Fac Sci, Dept Chem, Ibb, Yemen
[2] Aligarh Muslim Univ, Div Phys Chem, Dept Chem, Aligarh 202002, Uttar Pradesh, India
来源：
ARABIAN JOURNAL OF CHEMISTRY | 2011年 / 4卷 / 01期
关键词：
Ionic conductivity; Impedance spectroscopy; DSC; X-ray diffraction; CRYSTAL-STRUCTURES; TERNARY DERIVATIVES; COPPER MONOHALIDES; SILVER; TRANSPORT; PHASES; KAG4I5;
D O I：
10.1016/j.arabjc.2010.06.017
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Samples of general formulae (AgI)(4-2x)(CdI2)(x)KI and (AgI)(4-x)(CuI)(x)KI, x = 0-0.4, have been prepared and studied by conductivity measurements, powder X-ray diffraction and DSC techniques. Room temperature XRD reveals the presence of the orthorhombic K2AgI3 as the major component in the system. DSC traces show endothermic peaks in the temperature range of 309-330 K, depending on the sample composition. These are attributed to the solid state reaction between AgI and K2AgI3 to form the cubic KAg4I5. Impedance spectra show the prominence of electrode - electrolyte interface effect which is explained in terms of the high rate of ion migration. Ionic conductivity enhances with the increase of Cd2+ content, while Cu+ contained samples show a decrease in conductivity with increasing Cu+ ratio though the ionic conductivity remains higher than that of the pure one. (C) 2010 King Saud University. All rights reserved.
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页码：45 / 49
页数：5
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