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|Title:||Impedance spectroscopic analysis of nanophase Ag2HgI4 and Ag2HgI4-Al2O3 nanocomposites|
|Authors:||Potty, S Sankara Narayanan|
Khadar, M Abdul
|Abstract:||Nanoparticles of Ag2HgI4 have been prepared by chemical precipitation. The average particle size has been determined from x-ray line broadening. Grain and grain boundary contributions to the electrical conductivity of nanophase Ag2HgI4 and Ag2HgI4- Al2O3 nanocomposites are analyzed using impedance spectroscopy. The variations of these contributions with temperature and with the weight percentage of nano alumina are determined. The grain boundary conduction has been found to be less than the grain conduction in all the samples. The enhanced impedance of grain boundaries are attributed to the grain boundary properties of nanophase materials and the microsize space charge effects.|
|ISSN:||0975-1041 (Online); 0019-5596 (Print)|
|Appears in Collections:||IJPAP Vol.39(06) [June 2001]|
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