Dielectric properties of nanophase Ag2HgI4 and Ag2HgI4-Al2O3 nanocomposites

S Sankara Narayanan Potty… - Bulletin of Materials …, 2000 - Springer
Bulletin of Materials Science, 2000Springer
The dielectric properties of nanophase Ag 2 HgI 4 and Ag 2 HgI 4-Al 2 O 3 nanocomposites
at different frequencies have been studied over a temperature range covering the stability
range of β phase of Ag 2 HgI 4 and beyond the β to a phase transition temperature. έ′, tan
δ and σ ac of nanophase Ag 2 HgI 4 and Ag 2 HgI 4-Al 2 O 3 nanocomposites were found to
be larger than the reported values for polycrystalline pellets of Ag 2 HgI 4. The dielectric
properties of the nanocomposites were found to be a function of the wt.% of nano alumina …
Abstract
The dielectric properties of nanophase Ag2HgI4 and Ag2HgI4-Al2O3 nanocomposites at different frequencies have been studied over a temperature range covering the stability range of β phase of Ag2HgI4 and beyond the β to a phase transition temperature. έ′, tan δ and σa.c. of nanophase Ag2HgI4 and Ag2HgI4-Al2O3 nanocomposites were found to be larger than the reported values for polycrystalline pellets of Ag2HgI4. The dielectric properties of the nanocomposites were found to be a function of the wt.% of nano alumina. The observed changes are attributed to the grain boundary properties of nanophase materials and to the microsize space charge effects.
Springer
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