<span style="font-size:14.0pt;line-height: 115%;font-family:"Times New Roman";mso-fareast-font-family:"Times New Roman"; color:black;mso-ansi-language:EN-IN;mso-fareast-language:EN-IN;mso-bidi-language: HI" lang="EN-IN">Impedance spectroscopic analysis of nanophase Ag₂HgI₄ and Ag₂HgI₄-Al₂O₃ nanocomposites</span>

Abstract

Nanoparticles of Ag₂HgI₄have 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.