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IBLC effect leading to colossal dielectric constant in layered structured Eu2CuO4 ceramic

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Title IBLC effect leading to colossal dielectric constant in layered structured Eu2CuO4 ceramic
 
Creator SALAME, P
DRAI, R
PRAKASH, O
KULKARNI, AR
 
Subject Powders: chemical preparation
Grain size
Dielectric properties
CACU3TI4O12 CERAMICS
AC CONDUCTIVITY
TEMPERATURE
FERROELECTRICS
SPECTROSCOPY
DEPENDENCE
GD2CUO4
CUO
CAPACITORS
FREQUENCY
 
Description Dielectric (epsilon(r)') studies of phase pure T'-type Eu2CuO4 ceramics of two markedly different grain sizes (D), prepared by (i) conventional powder mixing and (ii) citrate complexation-Pechini process, have been carried out in the frequency range 0.1 Hz to 1 MHz, and at temperatures -100 degrees C to 150 degrees C. epsilon(r)' is found to be highly grain size dependent. For the sample with coarse bar-like grains (D-2 similar to 17 x 6 mu m(2)) epsilon(r)' is > 10(3), and for the finer grain size sample with bimodal distribution (D-1 similar to 1 mu m, D-2 similar to 3 mu m) epsilon(r)' is similar to 10(5); for both the samples, high epsilon(r)' value is nearly frequency independent over 500 Hz
 
Publisher ELSEVIER SCI LTD
 
Date 2014-12-28T16:53:23Z
2014-12-28T16:53:23Z
2014
 
Type Article
 
Identifier CERAMICS INTERNATIONAL, 40(3)4491-4498
0272-8842
1873-3956
http://dx.doi.org/10.1016/j.ceramint.2013.08.123
http://dspace.library.iitb.ac.in/jspui/handle/100/16934
 
Language English