AC impedance analysis of CsNO3:Al2O3 composite solid electrolyte systems
Resource
JOURNAL OF NON-CRYSTALLINE SOLIDS 352(2), 155-159
Journal
JOURNAL OF NON-CRYSTALLINE SOLIDS 352(2)
Pages
155-159
Date Issued
2006
Date
2006
Author(s)
Rao, M.V. Madhava
Reddy, S. Narender
Chary, A. Sadananda
DOI
246246/2006111501244022
Abstract
Complex impedance spectroscopic studies were carried out on CsNO3 and CsNO3–Al2O3 dispersed solid electrolyte systems (DSES)
in the temperature range of 100–350 C and the frequency 50 kHz–1 MHz. Dielectric constant, loss tangent, ac conductivity and dc ionic
conductivity (obtained from CIS) in these systems are presented. DC ionic conductivity is noticed to increase with temperature in the
extrinsic region in pure and dispersed systems. The enhancement of conductivity in DSES was observed to be about two orders of magnitude
over its pure form in the extrinsic region. This enhancement of conductivity was attributed to the formation of space charge layer
between the host material and the dispersoid. Enhancement in conductivity is found to increase with m/o up to 40 m/o where as it
decreased for 80 m/o. Dielectric constant, dielectric loss and ac conductivity are also found to increase with temperature, and with mole
percent it maintained the similar behavior as that of dc conductivity. These dielectric properties are interpreted in terms of space charge
polarization and increased concentration of defects in the interfacial layer formed between the host and the dispersoid.
Subjects
conductivity
dielectric properties
relaxation
electric modulus
fast ion conduction
solution chemistry
Publisher
Taipei:National Taiwan University Dept Chem Engn
Type
journal article
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